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class="vector-pinnable-header-label">Prif ddewislen</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-main-menu.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-main-menu.unpin">cuddio</button> </div> <div id="p-navigation" class="vector-menu mw-portlet mw-portlet-navigation" > <div class="vector-menu-heading"> Panel llywio </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage" class="mw-list-item"><a href="/wiki/Hafan" title="Ymweld â'r Hafan [z]" accesskey="z"><span>Hafan</span></a></li><li id="n-portal" class="mw-list-item"><a href="/wiki/Wicipedia:Porth_y_Gymuned" title="Pethau i'w gwneud, adnoddau a thudalennau'r gymuned"><span>Porth y Gymuned</span></a></li><li id="n-cafe" class="mw-list-item"><a href="/wiki/Wicipedia:Y_Caffi"><span>Y Caffi</span></a></li><li id="n-currentevents" class="mw-list-item"><a href="/wiki/Categori:Materion_cyfoes" title="Gwybodaeth yn gysylltiedig â materion cyfoes"><span>Materion cyfoes</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Arbennig:RecentChanges" title="Rhestr y newidiadau diweddar ar y wici. [r]" accesskey="r"><span>Newidiadau diweddar</span></a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/Arbennig:Random" title="Llwytho tudalen ar hap [x]" accesskey="x"><span>Erthygl ar hap</span></a></li><li id="n-help" class="mw-list-item"><a href="/wiki/Wicipedia:Cymorth" title="Tudalennau cymorth"><span>Cymorth</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Hafan" class="mw-logo"> <img class="mw-logo-icon" src="/static/images/icons/wikipedia.png" alt="" aria-hidden="true" height="50" width="50"> <span class="mw-logo-container skin-invert"> <img class="mw-logo-wordmark" alt="Wicipedia" src="/static/images/mobile/copyright/wikipedia-wordmark-cy.svg" style="width: 7.5em; height: 1.125em;"> <img class="mw-logo-tagline" alt="" src="/static/images/mobile/copyright/wikipedia-tagline-cy.svg" width="120" height="13" style="width: 7.5em; height: 0.8125em;"> </span> </a> </div> <div class="vector-header-end"> <div id="p-search" role="search" class="vector-search-box-vue vector-search-box-collapses vector-search-box-show-thumbnail vector-search-box-auto-expand-width vector-search-box"> <a href="/wiki/Arbennig:Search" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only search-toggle" title="Chwilio Wicipedia [f]" accesskey="f"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Chwilio</span> </a> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail cdx-typeahead-search--auto-expand-width"> <form action="/w/index.php" id="searchform" class="cdx-search-input cdx-search-input--has-end-button"> <div id="simpleSearch" class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Chwilio Wicipedia" aria-label="Chwilio Wicipedia" autocapitalize="sentences" title="Chwilio Wicipedia [f]" accesskey="f" id="searchInput" > <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Arbennig:Search"> </div> <button class="cdx-button cdx-search-input__end-button">Chwilio</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Offer personol"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Gwedd"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Newidiwch ymddangosiad maint ffont, lled a lliw y dudalen" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Gwedd" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Gwedd</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_cy.wikipedia.org&uselang=cy" class=""><span>Rhoi</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Arbennig:CreateAccount&returnto=20fed+ganrif" title="Rydym yn argymell eich bod yn creu cyfri ac yn menwgofnodi. Fodd bynnag, dydy hyn ddim yn orfodol" class=""><span>Creu cyfrif</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Arbennig:UserLogin&returnto=20fed+ganrif" title="Fe'ch anogir i fewngofnodi, er nad oes rhaid gwneud. [o]" accesskey="o" class=""><span>Mewngofnodi</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Rhagor o opsiynau" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Offer personol" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Offer personol</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="Dewislen defnyddiwr" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_cy.wikipedia.org&uselang=cy"><span>Rhoi</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Arbennig:CreateAccount&returnto=20fed+ganrif" title="Rydym yn argymell eich bod yn creu cyfri ac yn menwgofnodi. Fodd bynnag, dydy hyn ddim yn orfodol"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Creu cyfrif</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Arbennig:UserLogin&returnto=20fed+ganrif" title="Fe'ch anogir i fewngofnodi, er nad oes rhaid gwneud. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Mewngofnodi</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Tudalennau ar gyfer golygyddion allgofnodedig <a href="/wiki/Cymorth:Cyflwyniad" aria-label="Dysgu mwy am olygu"><span>dysgu mwy</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Arbennig:MyContributions" title="Rhestr golygiadau o'r cyfeiriad IP hwn [y]" accesskey="y"><span>Cyfraniadau</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Arbennig:MyTalk" title="Sgwrs ynglŷn â golygiadau o'r cyfeiriad IP hwn [n]" accesskey="n"><span>Sgwrs</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Safle"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Cynnwys" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Cynnwys</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">cuddio</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Y dechrau</div> </a> </li> <li id="toc-Rhyfeloedd_a_Gwleidyddiaeth" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Rhyfeloedd_a_Gwleidyddiaeth"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Rhyfeloedd a Gwleidyddiaeth</span> </div> </a> <ul id="toc-Rhyfeloedd_a_Gwleidyddiaeth-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Cerddoriaeth" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Cerddoriaeth"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Cerddoriaeth</span> </div> </a> <ul id="toc-Cerddoriaeth-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Ffilm,_theatr_a_theledu" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Ffilm,_theatr_a_theledu"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Ffilm, theatr a theledu</span> </div> </a> <ul id="toc-Ffilm,_theatr_a_theledu-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Gemau_Fideo" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Gemau_Fideo"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Gemau Fideo</span> </div> </a> <ul id="toc-Gemau_Fideo-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Celf_a_Phensaernïaeth" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Celf_a_Phensaernïaeth"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Celf a Phensaernïaeth</span> </div> </a> <ul id="toc-Celf_a_Phensaernïaeth-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Mathemateg" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Mathemateg"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Mathemateg</span> </div> </a> <ul id="toc-Mathemateg-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Chwaraeon" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Chwaraeon"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Chwaraeon</span> </div> </a> <ul id="toc-Chwaraeon-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Ffiseg" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Ffiseg"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Ffiseg</span> </div> </a> <ul id="toc-Ffiseg-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Seryddiaeth" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Seryddiaeth"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>Seryddiaeth</span> </div> </a> <ul id="toc-Seryddiaeth-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Bioleg" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Bioleg"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>Bioleg</span> </div> </a> <ul id="toc-Bioleg-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Meddygaeth" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Meddygaeth"> <div class="vector-toc-text"> <span class="vector-toc-numb">11</span> <span>Meddygaeth</span> </div> </a> <ul id="toc-Meddygaeth-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Afiechydon" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Afiechydon"> <div class="vector-toc-text"> <span class="vector-toc-numb">12</span> <span>Afiechydon</span> </div> </a> <ul id="toc-Afiechydon-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Egni_a'r_amgylchedd" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Egni_a'r_amgylchedd"> <div class="vector-toc-text"> <span class="vector-toc-numb">13</span> <span>Egni a'r amgylchedd</span> </div> </a> <ul id="toc-Egni_a'r_amgylchedd-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Peirianneg_a_thechnoleg" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Peirianneg_a_thechnoleg"> <div class="vector-toc-text"> <span class="vector-toc-numb">14</span> <span>Peirianneg a thechnoleg</span> </div> </a> <ul id="toc-Peirianneg_a_thechnoleg-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Y_Chwyldro_Digidol" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Y_Chwyldro_Digidol"> <div class="vector-toc-text"> <span class="vector-toc-numb">15</span> <span>Y Chwyldro Digidol</span> </div> </a> <ul id="toc-Y_Chwyldro_Digidol-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Fforio_yn_y_gofod" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Fforio_yn_y_gofod"> <div class="vector-toc-text"> <span class="vector-toc-numb">16</span> <span>Fforio yn y gofod</span> </div> </a> <ul id="toc-Fforio_yn_y_gofod-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Yr_20fed_ganrif_yng_Nghymru" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Yr_20fed_ganrif_yng_Nghymru"> <div class="vector-toc-text"> <span class="vector-toc-numb">17</span> <span>Yr 20fed ganrif yng Nghymru</span> </div> </a> <ul id="toc-Yr_20fed_ganrif_yng_Nghymru-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Blynyddoedd_a_degawdau" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Blynyddoedd_a_degawdau"> <div class="vector-toc-text"> <span class="vector-toc-numb">18</span> <span>Blynyddoedd a degawdau</span> </div> </a> <ul id="toc-Blynyddoedd_a_degawdau-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Gweler_hefyd" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Gweler_hefyd"> <div class="vector-toc-text"> <span class="vector-toc-numb">19</span> <span>Gweler hefyd</span> </div> </a> <ul id="toc-Gweler_hefyd-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Cyfeiriadau" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Cyfeiriadau"> <div class="vector-toc-text"> <span class="vector-toc-numb">20</span> <span>Cyfeiriadau</span> </div> </a> <ul id="toc-Cyfeiriadau-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Darllen_pellach" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Darllen_pellach"> <div class="vector-toc-text"> <span class="vector-toc-numb">21</span> <span>Darllen pellach</span> </div> </a> <ul id="toc-Darllen_pellach-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Cynnwys" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toglo'r tabl cynnwys" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toglo'r tabl cynnwys</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">20fed ganrif</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Ewch i erthygl mewn iaith arall. Ar gael mewn 170 iaith" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-170" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">170 iaith</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/20ste_eeu" title="20ste eeu - Affricaneg" lang="af" hreflang="af" data-title="20ste eeu" data-language-autonym="Afrikaans" data-language-local-name="Affricaneg" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-als mw-list-item"><a href="https://als.wikipedia.org/wiki/20._Jahrhundert" title="20. Jahrhundert - Almaeneg y Swistir" lang="gsw" hreflang="gsw" data-title="20. Jahrhundert" data-language-autonym="Alemannisch" data-language-local-name="Almaeneg y Swistir" class="interlanguage-link-target"><span>Alemannisch</span></a></li><li class="interlanguage-link interwiki-am mw-list-item"><a href="https://am.wikipedia.org/wiki/20%E1%8A%9B%E1%8B%8D_%E1%88%9D%E1%8B%95%E1%89%B0_%E1%8B%93%E1%88%98%E1%89%B5" title="20ኛው ምዕተ ዓመት - Amhareg" lang="am" hreflang="am" data-title="20ኛው ምዕተ ዓመት" data-language-autonym="አማርኛ" data-language-local-name="Amhareg" class="interlanguage-link-target"><span>አማርኛ</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Sieglo_XX" title="Sieglo XX - Aragoneg" lang="an" hreflang="an" data-title="Sieglo XX" data-language-autonym="Aragonés" data-language-local-name="Aragoneg" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-ang mw-list-item"><a href="https://ang.wikipedia.org/wiki/20e_g%C4%93arhundred" title="20e gēarhundred - Hen Saesneg" lang="ang" hreflang="ang" data-title="20e gēarhundred" data-language-autonym="Ænglisc" data-language-local-name="Hen Saesneg" class="interlanguage-link-target"><span>Ænglisc</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%A7%D9%84%D9%82%D8%B1%D9%86_20" title="القرن 20 - Arabeg" lang="ar" hreflang="ar" data-title="القرن 20" data-language-autonym="العربية" data-language-local-name="Arabeg" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ary mw-list-item"><a href="https://ary.wikipedia.org/wiki/%D9%84%D9%82%D8%B1%D9%86_20" title="لقرن 20 - Arabeg Moroco" lang="ary" hreflang="ary" data-title="لقرن 20" data-language-autonym="الدارجة" data-language-local-name="Arabeg Moroco" class="interlanguage-link-target"><span>الدارجة</span></a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/%D8%A7%D9%84%D9%82%D8%B1%D9%86_%D8%A7%D9%84%D8%B9%D8%B4%D8%B1%D9%8A%D9%86" title="القرن العشرين - Arabeg yr Aifft" lang="arz" hreflang="arz" data-title="القرن العشرين" data-language-autonym="مصرى" data-language-local-name="Arabeg yr Aifft" class="interlanguage-link-target"><span>مصرى</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Sieglu_XX" title="Sieglu XX - Astwrianeg" lang="ast" hreflang="ast" data-title="Sieglu XX" data-language-autonym="Asturianu" data-language-local-name="Astwrianeg" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-av mw-list-item"><a href="https://av.wikipedia.org/wiki/XX_%D0%B3%D3%80%D0%B0%D1%81%D1%80%D1%83" title="XX гӀасру - Afareg" lang="av" hreflang="av" data-title="XX гӀасру" data-language-autonym="Авар" data-language-local-name="Afareg" class="interlanguage-link-target"><span>Авар</span></a></li><li class="interlanguage-link interwiki-avk mw-list-item"><a href="https://avk.wikipedia.org/wiki/20-eafa_decemda" title="20-eafa decemda - Kotava" lang="avk" hreflang="avk" data-title="20-eafa decemda" data-language-autonym="Kotava" data-language-local-name="Kotava" class="interlanguage-link-target"><span>Kotava</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/XX_%C9%99sr" title="XX əsr - Aserbaijaneg" lang="az" hreflang="az" data-title="XX əsr" data-language-autonym="Azərbaycanca" data-language-local-name="Aserbaijaneg" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%DB%B2%DB%B0._%DB%8C%D9%88%D8%B2_%D8%A7%DB%8C%D9%84" title="۲۰. یوز ایل - South Azerbaijani" lang="azb" hreflang="azb" data-title="۲۰. یوز ایل" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-ba mw-list-item"><a href="https://ba.wikipedia.org/wiki/XX_%D0%B1%D1%8B%D1%83%D0%B0%D1%82" title="XX быуат - Bashcorteg" lang="ba" hreflang="ba" data-title="XX быуат" data-language-autonym="Башҡортса" data-language-local-name="Bashcorteg" class="interlanguage-link-target"><span>Башҡортса</span></a></li><li class="interlanguage-link interwiki-ban mw-list-item"><a href="https://ban.wikipedia.org/wiki/Abad_ka-20" title="Abad ka-20 - Balïeg" lang="ban" hreflang="ban" data-title="Abad ka-20" data-language-autonym="Basa Bali" data-language-local-name="Balïeg" class="interlanguage-link-target"><span>Basa Bali</span></a></li><li class="interlanguage-link interwiki-bat-smg mw-list-item"><a href="https://bat-smg.wikipedia.org/wiki/XX_om%C5%BEios" title="XX omžios - Samogiteg" lang="sgs" hreflang="sgs" data-title="XX omžios" data-language-autonym="Žemaitėška" data-language-local-name="Samogiteg" class="interlanguage-link-target"><span>Žemaitėška</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/XX_%D1%81%D1%82%D0%B0%D0%B3%D0%BE%D0%B4%D0%B4%D0%B7%D0%B5" title="XX стагоддзе - Belarwseg" lang="be" hreflang="be" data-title="XX стагоддзе" data-language-autonym="Беларуская" data-language-local-name="Belarwseg" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/XX_%D1%81%D1%82%D0%B0%D0%B3%D0%BE%D0%B4%D0%B7%D1%8C%D0%B4%D0%B7%D0%B5" title="XX стагодзьдзе - Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="XX стагодзьдзе" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/20_%D0%B2%D0%B5%D0%BA" title="20 век - Bwlgareg" lang="bg" hreflang="bg" data-title="20 век" data-language-autonym="Български" data-language-local-name="Bwlgareg" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%AC%E0%A6%BF%E0%A6%82%E0%A6%B6_%E0%A6%B6%E0%A6%A4%E0%A6%BE%E0%A6%AC%E0%A7%8D%E0%A6%A6%E0%A7%80" title="বিংশ শতাব্দী - Bengaleg" lang="bn" hreflang="bn" data-title="বিংশ শতাব্দী" data-language-autonym="বাংলা" data-language-local-name="Bengaleg" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/XXvet_kantved" title="XXvet kantved - Llydaweg" lang="br" hreflang="br" data-title="XXvet kantved" data-language-autonym="Brezhoneg" data-language-local-name="Llydaweg" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/20._vijek" title="20. vijek - Bosnieg" lang="bs" hreflang="bs" data-title="20. vijek" data-language-autonym="Bosanski" data-language-local-name="Bosnieg" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-bxr mw-list-item"><a href="https://bxr.wikipedia.org/wiki/XX_%D0%B7%D1%83%D1%83%D0%BD" title="XX зуун - Russia Buriat" lang="bxr" hreflang="bxr" data-title="XX зуун" data-language-autonym="Буряад" data-language-local-name="Russia Buriat" class="interlanguage-link-target"><span>Буряад</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Segle_XX" title="Segle XX - Catalaneg" lang="ca" hreflang="ca" data-title="Segle XX" data-language-autonym="Català" data-language-local-name="Catalaneg" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cdo mw-list-item"><a href="https://cdo.wikipedia.org/wiki/20_si%C3%A9-g%C4%AB" title="20 sié-gī - Mindong" lang="cdo" hreflang="cdo" data-title="20 sié-gī" data-language-autonym="閩東語 / Mìng-dĕ̤ng-ngṳ̄" data-language-local-name="Mindong" class="interlanguage-link-target"><span>閩東語 / Mìng-dĕ̤ng-ngṳ̄</span></a></li><li class="interlanguage-link interwiki-ce mw-list-item"><a href="https://ce.wikipedia.org/wiki/XX_%D0%B1%D3%80%D0%B5%D1%88%D0%BE" title="XX бӀешо - Tsietsieneg" lang="ce" hreflang="ce" data-title="XX бӀешо" data-language-autonym="Нохчийн" data-language-local-name="Tsietsieneg" class="interlanguage-link-target"><span>Нохчийн</span></a></li><li class="interlanguage-link interwiki-ceb mw-list-item"><a href="https://ceb.wikipedia.org/wiki/Kategoriya:Siglo_20" title="Kategoriya:Siglo 20 - Cebuano" lang="ceb" hreflang="ceb" data-title="Kategoriya:Siglo 20" data-language-autonym="Cebuano" data-language-local-name="Cebuano" class="interlanguage-link-target"><span>Cebuano</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D8%B3%DB%95%D8%AF%DB%95%DB%8C_%D9%A2%D9%A0%DB%95%D9%85" title="سەدەی ٢٠ەم - Cwrdeg Sorani" lang="ckb" hreflang="ckb" data-title="سەدەی ٢٠ەم" data-language-autonym="کوردی" data-language-local-name="Cwrdeg Sorani" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/20._stolet%C3%AD" title="20. století - Tsieceg" lang="cs" hreflang="cs" data-title="20. století" data-language-autonym="Čeština" data-language-local-name="Tsieceg" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/XX_%C4%95%D0%BC%C4%95%D1%80" title="XX ĕмĕр - Tshwfasheg" lang="cv" hreflang="cv" data-title="XX ĕмĕр" data-language-autonym="Чӑвашла" data-language-local-name="Tshwfasheg" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/20._%C3%A5rhundrede" title="20. århundrede - Daneg" lang="da" hreflang="da" data-title="20. århundrede" data-language-autonym="Dansk" data-language-local-name="Daneg" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/20._Jahrhundert" title="20. Jahrhundert - Almaeneg" lang="de" hreflang="de" data-title="20. Jahrhundert" data-language-autonym="Deutsch" data-language-local-name="Almaeneg" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-diq mw-list-item"><a href="https://diq.wikipedia.org/wiki/Seserra_20%C4%B1ne" title="Seserra 20ıne - Zazaki" lang="diq" hreflang="diq" data-title="Seserra 20ıne" data-language-autonym="Zazaki" data-language-local-name="Zazaki" class="interlanguage-link-target"><span>Zazaki</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/20%CF%8C%CF%82_%CE%B1%CE%B9%CF%8E%CE%BD%CE%B1%CF%82" title="20ός αιώνας - Groeg" lang="el" hreflang="el" data-title="20ός αιώνας" data-language-autonym="Ελληνικά" data-language-local-name="Groeg" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-eml mw-list-item"><a href="https://eml.wikipedia.org/wiki/XX_s%C3%A9cul" title="XX sécul - Emiliano-Romagnolo" lang="egl" hreflang="egl" data-title="XX sécul" data-language-autonym="Emiliàn e rumagnòl" data-language-local-name="Emiliano-Romagnolo" class="interlanguage-link-target"><span>Emiliàn e rumagnòl</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/20th_century" title="20th century - Saesneg" lang="en" hreflang="en" data-title="20th century" data-language-autonym="English" data-language-local-name="Saesneg" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/20-a_jarcento" title="20-a jarcento - Esperanto" lang="eo" hreflang="eo" data-title="20-a jarcento" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Siglo_XX" title="Siglo XX - Sbaeneg" lang="es" hreflang="es" data-title="Siglo XX" data-language-autonym="Español" data-language-local-name="Sbaeneg" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/20._sajand" title="20. sajand - Estoneg" lang="et" hreflang="et" data-title="20. sajand" data-language-autonym="Eesti" data-language-local-name="Estoneg" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/XX._mendea" title="XX. mendea - Basgeg" lang="eu" hreflang="eu" data-title="XX. mendea" data-language-autonym="Euskara" data-language-local-name="Basgeg" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-ext mw-list-item"><a href="https://ext.wikipedia.org/wiki/Sigru_XX" title="Sigru XX - Extremadureg" lang="ext" hreflang="ext" data-title="Sigru XX" data-language-autonym="Estremeñu" data-language-local-name="Extremadureg" class="interlanguage-link-target"><span>Estremeñu</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B3%D8%AF%D9%87_%D8%A8%DB%8C%D8%B3%D8%AA%D9%85_%D9%85%DB%8C%D9%84%D8%A7%D8%AF%DB%8C" title="سده بیستم میلادی - Perseg" lang="fa" hreflang="fa" data-title="سده بیستم میلادی" data-language-autonym="فارسی" data-language-local-name="Perseg" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/1900-luku" title="1900-luku - Ffinneg" lang="fi" hreflang="fi" data-title="1900-luku" data-language-autonym="Suomi" data-language-local-name="Ffinneg" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fiu-vro mw-list-item"><a href="https://fiu-vro.wikipedia.org/wiki/20._aastagasada" title="20. aastagasada - Võro" lang="vro" hreflang="vro" data-title="20. aastagasada" data-language-autonym="Võro" data-language-local-name="Võro" class="interlanguage-link-target"><span>Võro</span></a></li><li class="interlanguage-link interwiki-fo mw-list-item"><a href="https://fo.wikipedia.org/wiki/20._%C3%B8ld" title="20. øld - Ffaröeg" lang="fo" hreflang="fo" data-title="20. øld" data-language-autonym="Føroyskt" data-language-local-name="Ffaröeg" class="interlanguage-link-target"><span>Føroyskt</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/XXe_si%C3%A8cle" title="XXe siècle - Ffrangeg" lang="fr" hreflang="fr" data-title="XXe siècle" data-language-autonym="Français" data-language-local-name="Ffrangeg" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-frp mw-list-item"><a href="https://frp.wikipedia.org/wiki/XX%C3%A9mo_si%C3%A8cllo" title="XXémo siècllo - Arpitaneg" lang="frp" hreflang="frp" data-title="XXémo siècllo" data-language-autonym="Arpetan" data-language-local-name="Arpitaneg" class="interlanguage-link-target"><span>Arpetan</span></a></li><li class="interlanguage-link interwiki-frr mw-list-item"><a href="https://frr.wikipedia.org/wiki/20._juarhunert" title="20. juarhunert - Ffriseg Gogleddol" lang="frr" hreflang="frr" data-title="20. juarhunert" data-language-autonym="Nordfriisk" data-language-local-name="Ffriseg Gogleddol" class="interlanguage-link-target"><span>Nordfriisk</span></a></li><li class="interlanguage-link interwiki-fy mw-list-item"><a href="https://fy.wikipedia.org/wiki/20e_iuw" title="20e iuw - Ffriseg y Gorllewin" lang="fy" hreflang="fy" data-title="20e iuw" data-language-autonym="Frysk" data-language-local-name="Ffriseg y Gorllewin" class="interlanguage-link-target"><span>Frysk</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/20%C3%BA_haois" title="20ú haois - Gwyddeleg" lang="ga" hreflang="ga" data-title="20ú haois" data-language-autonym="Gaeilge" data-language-local-name="Gwyddeleg" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gan mw-list-item"><a href="https://gan.wikipedia.org/wiki/20%E4%B8%96%E7%B4%80" title="20世紀 - Gan" lang="gan" hreflang="gan" data-title="20世紀" data-language-autonym="贛語" data-language-local-name="Gan" class="interlanguage-link-target"><span>贛語</span></a></li><li class="interlanguage-link interwiki-gd mw-list-item"><a href="https://gd.wikipedia.org/wiki/20mh_Linn" title="20mh Linn - Gaeleg yr Alban" lang="gd" hreflang="gd" data-title="20mh Linn" data-language-autonym="Gàidhlig" data-language-local-name="Gaeleg yr Alban" class="interlanguage-link-target"><span>Gàidhlig</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/S%C3%A9culo_XX" title="Século XX - Galisieg" lang="gl" hreflang="gl" data-title="Século XX" data-language-autonym="Galego" data-language-local-name="Galisieg" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-gv mw-list-item"><a href="https://gv.wikipedia.org/wiki/20oo_eash" title="20oo eash - Manaweg" lang="gv" hreflang="gv" data-title="20oo eash" data-language-autonym="Gaelg" data-language-local-name="Manaweg" class="interlanguage-link-target"><span>Gaelg</span></a></li><li class="interlanguage-link interwiki-hak mw-list-item"><a href="https://hak.wikipedia.org/wiki/20_s%E1%B9%B3-ki" title="20 sṳ-ki - Hakka Chinese" lang="hak" hreflang="hak" data-title="20 sṳ-ki" data-language-autonym="客家語 / Hak-kâ-ngî" data-language-local-name="Hakka Chinese" class="interlanguage-link-target"><span>客家語 / Hak-kâ-ngî</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%94%D7%9E%D7%90%D7%94_%D7%94-20" title="המאה ה-20 - Hebraeg" lang="he" hreflang="he" data-title="המאה ה-20" data-language-autonym="עברית" data-language-local-name="Hebraeg" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%AC%E0%A5%80%E0%A4%B8%E0%A4%B5%E0%A5%80%E0%A4%82_%E0%A4%B6%E0%A4%A4%E0%A4%BE%E0%A4%AC%E0%A5%8D%E0%A4%A6%E0%A5%80" title="बीसवीं शताब्दी - Hindi" lang="hi" hreflang="hi" data-title="बीसवीं शताब्दी" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hif mw-list-item"><a href="https://hif.wikipedia.org/wiki/20th_century" title="20th century - Fiji Hindi" lang="hif" hreflang="hif" data-title="20th century" data-language-autonym="Fiji Hindi" data-language-local-name="Fiji Hindi" class="interlanguage-link-target"><span>Fiji Hindi</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/20._stolje%C4%87e" title="20. stoljeće - Croateg" lang="hr" hreflang="hr" data-title="20. stoljeće" data-language-autonym="Hrvatski" data-language-local-name="Croateg" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hsb mw-list-item"><a href="https://hsb.wikipedia.org/wiki/20._l%C4%9Btstotk" title="20. lětstotk - Sorbeg Uchaf" lang="hsb" hreflang="hsb" data-title="20. lětstotk" data-language-autonym="Hornjoserbsce" data-language-local-name="Sorbeg Uchaf" class="interlanguage-link-target"><span>Hornjoserbsce</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/20._sz%C3%A1zad" title="20. század - Hwngareg" lang="hu" hreflang="hu" data-title="20. század" data-language-autonym="Magyar" data-language-local-name="Hwngareg" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/20-%D6%80%D5%A4_%D5%A4%D5%A1%D6%80" title="20-րդ դար - Armeneg" lang="hy" hreflang="hy" data-title="20-րդ դար" data-language-autonym="Հայերեն" data-language-local-name="Armeneg" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/Seculo_20" title="Seculo 20 - Interlingua" lang="ia" hreflang="ia" data-title="Seculo 20" data-language-autonym="Interlingua" data-language-local-name="Interlingua" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-id badge-Q70893996 mw-list-item" title=""><a href="https://id.wikipedia.org/wiki/Abad_ke-20" title="Abad ke-20 - Indoneseg" lang="id" hreflang="id" data-title="Abad ke-20" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indoneseg" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ilo mw-list-item"><a href="https://ilo.wikipedia.org/wiki/Maika-20_a_siglo" title="Maika-20 a siglo - Ilocaneg" lang="ilo" hreflang="ilo" data-title="Maika-20 a siglo" data-language-autonym="Ilokano" data-language-local-name="Ilocaneg" class="interlanguage-link-target"><span>Ilokano</span></a></li><li class="interlanguage-link interwiki-inh mw-list-item"><a href="https://inh.wikipedia.org/wiki/XX_%D0%B1%D3%80%D0%B0%D1%8C%D1%88%D1%83" title="XX бӀаьшу - Ingwsieg" lang="inh" hreflang="inh" data-title="XX бӀаьшу" data-language-autonym="ГӀалгӀай" data-language-local-name="Ingwsieg" class="interlanguage-link-target"><span>ГӀалгӀай</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/20ma_yarcento" title="20ma yarcento - Ido" lang="io" hreflang="io" data-title="20ma yarcento" data-language-autonym="Ido" data-language-local-name="Ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/20._%C3%B6ldin" title="20. öldin - Islandeg" lang="is" hreflang="is" data-title="20. öldin" data-language-autonym="Íslenska" data-language-local-name="Islandeg" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/XX_secolo" title="XX secolo - Eidaleg" lang="it" hreflang="it" data-title="XX secolo" data-language-autonym="Italiano" data-language-local-name="Eidaleg" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/20%E4%B8%96%E7%B4%80" title="20世紀 - Japaneeg" lang="ja" hreflang="ja" data-title="20世紀" data-language-autonym="日本語" data-language-local-name="Japaneeg" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-jbo mw-list-item"><a href="https://jbo.wikipedia.org/wiki/19xyxymoi" title="19xyxymoi - Lojban" lang="jbo" hreflang="jbo" data-title="19xyxymoi" data-language-autonym="La .lojban." data-language-local-name="Lojban" class="interlanguage-link-target"><span>La .lojban.</span></a></li><li class="interlanguage-link interwiki-jv mw-list-item"><a href="https://jv.wikipedia.org/wiki/Abad_ping_20" title="Abad ping 20 - Jafanaeg" lang="jv" hreflang="jv" data-title="Abad ping 20" data-language-autonym="Jawa" data-language-local-name="Jafanaeg" class="interlanguage-link-target"><span>Jawa</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/XX_%E1%83%A1%E1%83%90%E1%83%A3%E1%83%99%E1%83%A3%E1%83%9C%E1%83%94" title="XX საუკუნე - Georgeg" lang="ka" hreflang="ka" data-title="XX საუკუნე" data-language-autonym="ქართული" data-language-local-name="Georgeg" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kab mw-list-item"><a href="https://kab.wikipedia.org/wiki/Lqern_wis_20" title="Lqern wis 20 - Cabileg" lang="kab" hreflang="kab" data-title="Lqern wis 20" data-language-autonym="Taqbaylit" data-language-local-name="Cabileg" class="interlanguage-link-target"><span>Taqbaylit</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/XX_%D2%93%D0%B0%D1%81%D1%8B%D1%80" title="XX ғасыр - Casacheg" lang="kk" hreflang="kk" data-title="XX ғасыр" data-language-autonym="Қазақша" data-language-local-name="Casacheg" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/20%EC%84%B8%EA%B8%B0" title="20세기 - Coreeg" lang="ko" hreflang="ko" data-title="20세기" data-language-autonym="한국어" data-language-local-name="Coreeg" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ku mw-list-item"><a href="https://ku.wikipedia.org/wiki/Sedsala_20an" title="Sedsala 20an - Cwrdeg" lang="ku" hreflang="ku" data-title="Sedsala 20an" data-language-autonym="Kurdî" data-language-local-name="Cwrdeg" class="interlanguage-link-target"><span>Kurdî</span></a></li><li class="interlanguage-link interwiki-kv mw-list-item"><a href="https://kv.wikipedia.org/wiki/XX_%D0%BD%D1%8D%D0%BC" title="XX нэм - Comi" lang="kv" hreflang="kv" data-title="XX нэм" data-language-autonym="Коми" data-language-local-name="Comi" class="interlanguage-link-target"><span>Коми</span></a></li><li class="interlanguage-link interwiki-kw mw-list-item"><a href="https://kw.wikipedia.org/wiki/20ves_kansbledhen" title="20ves kansbledhen - Cernyweg" lang="kw" hreflang="kw" data-title="20ves kansbledhen" data-language-autonym="Kernowek" data-language-local-name="Cernyweg" class="interlanguage-link-target"><span>Kernowek</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Saeculum_20" title="Saeculum 20 - Lladin" lang="la" hreflang="la" data-title="Saeculum 20" data-language-autonym="Latina" data-language-local-name="Lladin" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/20._Joerhonnert" title="20. Joerhonnert - Lwcsembwrgeg" lang="lb" hreflang="lb" data-title="20. Joerhonnert" data-language-autonym="Lëtzebuergesch" data-language-local-name="Lwcsembwrgeg" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-lez mw-list-item"><a href="https://lez.wikipedia.org/wiki/XX_%D0%B2%D0%B8%D1%88_%D0%B9%D0%B8%D1%81" title="XX виш йис - Lezgheg" lang="lez" hreflang="lez" data-title="XX виш йис" data-language-autonym="Лезги" data-language-local-name="Lezgheg" class="interlanguage-link-target"><span>Лезги</span></a></li><li class="interlanguage-link interwiki-lfn mw-list-item"><a href="https://lfn.wikipedia.org/wiki/Sentenio_20" title="Sentenio 20 - Lingua Franca Nova" lang="lfn" hreflang="lfn" data-title="Sentenio 20" data-language-autonym="Lingua Franca Nova" data-language-local-name="Lingua Franca Nova" class="interlanguage-link-target"><span>Lingua Franca Nova</span></a></li><li class="interlanguage-link interwiki-li mw-list-item"><a href="https://li.wikipedia.org/wiki/Twintegste_iew" title="Twintegste iew - Limbwrgeg" lang="li" hreflang="li" data-title="Twintegste iew" data-language-autonym="Limburgs" data-language-local-name="Limbwrgeg" class="interlanguage-link-target"><span>Limburgs</span></a></li><li class="interlanguage-link interwiki-lij mw-list-item"><a href="https://lij.wikipedia.org/wiki/XX_secolo" title="XX secolo - Ligurian" lang="lij" hreflang="lij" data-title="XX secolo" data-language-autonym="Ligure" data-language-local-name="Ligurian" class="interlanguage-link-target"><span>Ligure</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/S%C3%A9cul_XX" title="Sécul XX - Lombardeg" lang="lmo" hreflang="lmo" data-title="Sécul XX" data-language-autonym="Lombard" data-language-local-name="Lombardeg" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-ln mw-list-item"><a href="https://ln.wikipedia.org/wiki/Bonk%C3%A1m%C3%A1_bwa_XX" title="Bonkámá bwa XX - Lingala" lang="ln" hreflang="ln" data-title="Bonkámá bwa XX" data-language-autonym="Lingála" data-language-local-name="Lingala" class="interlanguage-link-target"><span>Lingála</span></a></li><li class="interlanguage-link interwiki-lo mw-list-item"><a href="https://lo.wikipedia.org/wiki/%E0%BA%84%E0%BA%B4%E0%BA%94%E0%BA%95%E0%BA%B0%E0%BA%AA%E0%BA%B0%E0%BA%95%E0%BA%B0%E0%BA%A7%E0%BA%B1%E0%BA%94%E0%BA%97%E0%BA%B5%E0%BB%88_20" title="ຄິດຕະສະຕະວັດທີ່ 20 - Laoeg" lang="lo" hreflang="lo" data-title="ຄິດຕະສະຕະວັດທີ່ 20" data-language-autonym="ລາວ" data-language-local-name="Laoeg" class="interlanguage-link-target"><span>ລາວ</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/XX_am%C5%BEius" title="XX amžius - Lithwaneg" lang="lt" hreflang="lt" data-title="XX amžius" data-language-autonym="Lietuvių" data-language-local-name="Lithwaneg" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-ltg mw-list-item"><a href="https://ltg.wikipedia.org/wiki/20_godu_symts" title="20 godu symts - Latgaleg" lang="ltg" hreflang="ltg" data-title="20 godu symts" data-language-autonym="Latgaļu" data-language-local-name="Latgaleg" class="interlanguage-link-target"><span>Latgaļu</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/20._gadsimts" title="20. gadsimts - Latfieg" lang="lv" hreflang="lv" data-title="20. gadsimts" data-language-autonym="Latviešu" data-language-local-name="Latfieg" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-map-bms mw-list-item"><a href="https://map-bms.wikipedia.org/wiki/Abad_kaping-20" title="Abad kaping-20 - Banyumasan" lang="jv-x-bms" hreflang="jv-x-bms" data-title="Abad kaping-20" data-language-autonym="Basa Banyumasan" data-language-local-name="Banyumasan" class="interlanguage-link-target"><span>Basa Banyumasan</span></a></li><li class="interlanguage-link interwiki-mhr mw-list-item"><a href="https://mhr.wikipedia.org/wiki/XX_%D0%BA%D1%83%D1%80%D1%8B%D0%BC" title="XX курым - Eastern Mari" lang="mhr" hreflang="mhr" data-title="XX курым" data-language-autonym="Олык марий" data-language-local-name="Eastern Mari" class="interlanguage-link-target"><span>Олык марий</span></a></li><li class="interlanguage-link interwiki-mi mw-list-item"><a href="https://mi.wikipedia.org/wiki/Rautau_20" title="Rautau 20 - Māori" lang="mi" hreflang="mi" data-title="Rautau 20" data-language-autonym="Māori" data-language-local-name="Māori" class="interlanguage-link-target"><span>Māori</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/20_%D0%B2%D0%B5%D0%BA" title="20 век - Macedoneg" lang="mk" hreflang="mk" data-title="20 век" data-language-autonym="Македонски" data-language-local-name="Macedoneg" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%87%E0%B4%B0%E0%B5%81%E0%B4%AA%E0%B4%A4%E0%B4%BE%E0%B4%82_%E0%B4%A8%E0%B5%82%E0%B4%B1%E0%B5%8D%E0%B4%B1%E0%B4%BE%E0%B4%A3%E0%B5%8D%E0%B4%9F%E0%B5%8D" title="ഇരുപതാം നൂറ്റാണ്ട് - Malayalam" lang="ml" hreflang="ml" data-title="ഇരുപതാം നൂറ്റാണ്ട്" data-language-autonym="മലയാളം" data-language-local-name="Malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/20-%D1%80_%D0%B7%D1%83%D1%83%D0%BD" title="20-р зуун - Mongoleg" lang="mn" hreflang="mn" data-title="20-р зуун" data-language-autonym="Монгол" data-language-local-name="Mongoleg" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%87.%E0%A4%B8.%E0%A4%9A%E0%A5%87_%E0%A5%A8%E0%A5%A6_%E0%A4%B5%E0%A5%87_%E0%A4%B6%E0%A4%A4%E0%A4%95" title="इ.स.चे २० वे शतक - Marathi" lang="mr" hreflang="mr" data-title="इ.स.चे २० वे शतक" data-language-autonym="मराठी" data-language-local-name="Marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Abad_ke-20" title="Abad ke-20 - Maleieg" lang="ms" hreflang="ms" data-title="Abad ke-20" data-language-autonym="Bahasa Melayu" data-language-local-name="Maleieg" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-mwl mw-list-item"><a href="https://mwl.wikipedia.org/wiki/Seclo_XX" title="Seclo XX - Mirandeg" lang="mwl" hreflang="mwl" data-title="Seclo XX" data-language-autonym="Mirandés" data-language-local-name="Mirandeg" class="interlanguage-link-target"><span>Mirandés</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%81%82%E1%81%80_%E1%80%9B%E1%80%AC%E1%80%85%E1%80%AF%E1%80%94%E1%80%BE%E1%80%85%E1%80%BA" title="၂၀ ရာစုနှစ် - Byrmaneg" lang="my" hreflang="my" data-title="၂၀ ရာစုနှစ်" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="Byrmaneg" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-myv mw-list-item"><a href="https://myv.wikipedia.org/wiki/XX_%D0%BF%D0%B8%D0%BD%D0%B3%D0%B5" title="XX пинге - Erzya" lang="myv" hreflang="myv" data-title="XX пинге" data-language-autonym="Эрзянь" data-language-local-name="Erzya" class="interlanguage-link-target"><span>Эрзянь</span></a></li><li class="interlanguage-link interwiki-mzn mw-list-item"><a href="https://mzn.wikipedia.org/wiki/%D9%82%D8%B1%D9%86_%DB%B2%DB%B0" title="قرن ۲۰ - Masanderani" lang="mzn" hreflang="mzn" data-title="قرن ۲۰" data-language-autonym="مازِرونی" data-language-local-name="Masanderani" class="interlanguage-link-target"><span>مازِرونی</span></a></li><li class="interlanguage-link interwiki-nah mw-list-item"><a href="https://nah.wikipedia.org/wiki/Macuilpohualxihuitl_XX" title="Macuilpohualxihuitl XX - Nahuatl" lang="nah" hreflang="nah" data-title="Macuilpohualxihuitl XX" data-language-autonym="Nāhuatl" data-language-local-name="Nahuatl" class="interlanguage-link-target"><span>Nāhuatl</span></a></li><li class="interlanguage-link interwiki-nap mw-list-item"><a href="https://nap.wikipedia.org/wiki/XX_seculo" title="XX seculo - Naplieg" lang="nap" hreflang="nap" data-title="XX seculo" data-language-autonym="Napulitano" data-language-local-name="Naplieg" class="interlanguage-link-target"><span>Napulitano</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/20._Johrhunnert" title="20. Johrhunnert - Almaeneg Isel" lang="nds" hreflang="nds" data-title="20. Johrhunnert" data-language-autonym="Plattdüütsch" data-language-local-name="Almaeneg Isel" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-nds-nl mw-list-item"><a href="https://nds-nl.wikipedia.org/wiki/20e_ieuw" title="20e ieuw - Sacsoneg Isel" lang="nds-NL" hreflang="nds-NL" data-title="20e ieuw" data-language-autonym="Nedersaksies" data-language-local-name="Sacsoneg Isel" class="interlanguage-link-target"><span>Nedersaksies</span></a></li><li class="interlanguage-link interwiki-ne mw-list-item"><a href="https://ne.wikipedia.org/wiki/%E0%A4%AC%E0%A5%80%E0%A4%B8%E0%A5%8C%E0%A4%81_%E0%A4%B6%E0%A4%A4%E0%A4%BE%E0%A4%AC%E0%A5%8D%E0%A4%A6%E0%A5%80" title="बीसौँ शताब्दी - Nepaleg" lang="ne" hreflang="ne" data-title="बीसौँ शताब्दी" data-language-autonym="नेपाली" data-language-local-name="Nepaleg" class="interlanguage-link-target"><span>नेपाली</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/20e_eeuw" title="20e eeuw - Iseldireg" lang="nl" hreflang="nl" data-title="20e eeuw" data-language-autonym="Nederlands" data-language-local-name="Iseldireg" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/1900-talet" title="1900-talet - Norwyeg Nynorsk" lang="nn" hreflang="nn" data-title="1900-talet" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwyeg Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/20._%C3%A5rhundre" title="20. århundre - Norwyeg Bokmål" lang="nb" hreflang="nb" data-title="20. århundre" data-language-autonym="Norsk bokmål" data-language-local-name="Norwyeg Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nov mw-list-item"><a href="https://nov.wikipedia.org/wiki/20esmi_sekle" title="20esmi sekle - Novial" lang="nov" hreflang="nov" data-title="20esmi sekle" data-language-autonym="Novial" data-language-local-name="Novial" class="interlanguage-link-target"><span>Novial</span></a></li><li class="interlanguage-link interwiki-nrm mw-list-item"><a href="https://nrm.wikipedia.org/wiki/XXe_s." title="XXe s. - Norman" lang="nrf" hreflang="nrf" data-title="XXe s." data-language-autonym="Nouormand" data-language-local-name="Norman" class="interlanguage-link-target"><span>Nouormand</span></a></li><li class="interlanguage-link interwiki-nso mw-list-item"><a href="https://nso.wikipedia.org/wiki/Ngwagakgolo_20" title="Ngwagakgolo 20 - Sotho Gogleddol" lang="nso" hreflang="nso" data-title="Ngwagakgolo 20" data-language-autonym="Sesotho sa Leboa" data-language-local-name="Sotho Gogleddol" class="interlanguage-link-target"><span>Sesotho sa Leboa</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/S%C3%A8gle_XX" title="Sègle XX - Ocsitaneg" lang="oc" hreflang="oc" data-title="Sègle XX" data-language-autonym="Occitan" data-language-local-name="Ocsitaneg" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-olo mw-list-item"><a href="https://olo.wikipedia.org/wiki/XX_vuozisada" title="XX vuozisada - Livvi-Karelian" lang="olo" hreflang="olo" data-title="XX vuozisada" data-language-autonym="Livvinkarjala" data-language-local-name="Livvi-Karelian" class="interlanguage-link-target"><span>Livvinkarjala</span></a></li><li class="interlanguage-link interwiki-os mw-list-item"><a href="https://os.wikipedia.org/wiki/XX_%C3%A6%D0%BD%D1%83%D1%81" title="XX æнус - Oseteg" lang="os" hreflang="os" data-title="XX æнус" data-language-autonym="Ирон" data-language-local-name="Oseteg" class="interlanguage-link-target"><span>Ирон</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/20%E0%A8%B5%E0%A9%80%E0%A8%82_%E0%A8%B8%E0%A8%A6%E0%A9%80" title="20ਵੀਂ ਸਦੀ - Pwnjabeg" lang="pa" hreflang="pa" data-title="20ਵੀਂ ਸਦੀ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="Pwnjabeg" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pap mw-list-item"><a href="https://pap.wikipedia.org/wiki/Siglo_20" title="Siglo 20 - Papiamento" lang="pap" hreflang="pap" data-title="Siglo 20" data-language-autonym="Papiamentu" data-language-local-name="Papiamento" class="interlanguage-link-target"><span>Papiamentu</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/XX_wiek" title="XX wiek - Pwyleg" lang="pl" hreflang="pl" data-title="XX wiek" data-language-autonym="Polski" data-language-local-name="Pwyleg" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%D9%88%DB%8C%DB%81%D9%88%D9%8A%DA%BA_%D8%B5%D8%AF%DB%8C" title="ویہويں صدی - Western Punjabi" lang="pnb" hreflang="pnb" data-title="ویہويں صدی" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%D8%B4%D9%84%D9%85%D9%87_%D9%BE%DB%90%DA%93%DB%8D" title="شلمه پېړۍ - Pashto" lang="ps" hreflang="ps" data-title="شلمه پېړۍ" data-language-autonym="پښتو" data-language-local-name="Pashto" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/S%C3%A9culo_XX" title="Século XX - Portiwgaleg" lang="pt" hreflang="pt" data-title="Século XX" data-language-autonym="Português" data-language-local-name="Portiwgaleg" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-qu mw-list-item"><a href="https://qu.wikipedia.org/wiki/20_%C3%B1iqin_pachakwata" title="20 ñiqin pachakwata - Quechua" lang="qu" hreflang="qu" data-title="20 ñiqin pachakwata" data-language-autonym="Runa Simi" data-language-local-name="Quechua" class="interlanguage-link-target"><span>Runa Simi</span></a></li><li class="interlanguage-link interwiki-rm mw-list-item"><a href="https://rm.wikipedia.org/wiki/20avel_tschientaner" title="20avel tschientaner - Románsh" lang="rm" hreflang="rm" data-title="20avel tschientaner" data-language-autonym="Rumantsch" data-language-local-name="Románsh" class="interlanguage-link-target"><span>Rumantsch</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Secolul_al_XX-lea" title="Secolul al XX-lea - Rwmaneg" lang="ro" hreflang="ro" data-title="Secolul al XX-lea" data-language-autonym="Română" data-language-local-name="Rwmaneg" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/XX_%D0%B2%D0%B5%D0%BA" title="XX век - Rwseg" lang="ru" hreflang="ru" data-title="XX век" data-language-autonym="Русский" data-language-local-name="Rwseg" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-rue mw-list-item"><a href="https://rue.wikipedia.org/wiki/XX._%D1%81%D1%82%D0%BE%D1%80%D0%BE%D1%87%D0%B0" title="XX. стороча - Rusyn" lang="rue" hreflang="rue" data-title="XX. стороча" data-language-autonym="Русиньскый" data-language-local-name="Rusyn" class="interlanguage-link-target"><span>Русиньскый</span></a></li><li class="interlanguage-link interwiki-sah mw-list-item"><a href="https://sah.wikipedia.org/wiki/XX_%D2%AF%D0%B9%D1%8D" title="XX үйэ - Sakha" lang="sah" hreflang="sah" data-title="XX үйэ" data-language-autonym="Саха тыла" data-language-local-name="Sakha" class="interlanguage-link-target"><span>Саха тыла</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/S%C3%A8culu_XX" title="Sèculu XX - Sisileg" lang="scn" hreflang="scn" data-title="Sèculu XX" data-language-autonym="Sicilianu" data-language-local-name="Sisileg" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-sco mw-list-item"><a href="https://sco.wikipedia.org/wiki/20t_century" title="20t century - Sgoteg" lang="sco" hreflang="sco" data-title="20t century" data-language-autonym="Scots" data-language-local-name="Sgoteg" class="interlanguage-link-target"><span>Scots</span></a></li><li class="interlanguage-link interwiki-se mw-list-item"><a href="https://se.wikipedia.org/wiki/1900-lohku_(jahke%C4%8Duohti)" title="1900-lohku (jahkečuohti) - Sami Gogleddol" lang="se" hreflang="se" data-title="1900-lohku (jahkečuohti)" data-language-autonym="Davvisámegiella" data-language-local-name="Sami Gogleddol" class="interlanguage-link-target"><span>Davvisámegiella</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/20._vijek" title="20. vijek - Serbo-Croateg" lang="sh" hreflang="sh" data-title="20. vijek" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Serbo-Croateg" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-shn mw-list-item"><a href="https://shn.wikipedia.org/wiki/%E1%80%95%E1%80%AE%E1%82%81%E1%80%B0%E1%80%9D%E1%80%BA%E1%80%95%E1%81%A2%E1%81%B5%E1%80%BA%E1%82%87_20" title="ပီႁူဝ်ပၢၵ်ႇ 20 - Shan" lang="shn" hreflang="shn" data-title="ပီႁူဝ်ပၢၵ်ႇ 20" data-language-autonym="ၽႃႇသႃႇတႆး " data-language-local-name="Shan" class="interlanguage-link-target"><span>ၽႃႇသႃႇတႆး </span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B6%9A%E0%B7%8A%E2%80%8D%E0%B6%BB%E0%B7%92%E0%B7%83%E0%B7%8A%E0%B6%AD%E0%B7%94_%E0%B7%80%E0%B6%BB%E0%B7%8A%E0%B7%82_20_%E0%B7%80%E0%B6%B1_%E0%B7%83%E0%B7%92%E0%B6%BA%E0%B7%80%E0%B7%83" title="ක්‍රිස්තු වර්ෂ 20 වන සියවස - Sinhaleg" lang="si" hreflang="si" data-title="ක්‍රිස්තු වර්ෂ 20 වන සියවස" data-language-autonym="සිංහල" data-language-local-name="Sinhaleg" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/20th_century" title="20th century - Simple English" lang="en-simple" hreflang="en-simple" data-title="20th century" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/20._storo%C4%8Die" title="20. storočie - Slofaceg" lang="sk" hreflang="sk" data-title="20. storočie" data-language-autonym="Slovenčina" data-language-local-name="Slofaceg" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/20._stoletje" title="20. stoletje - Slofeneg" lang="sl" hreflang="sl" data-title="20. stoletje" data-language-autonym="Slovenščina" data-language-local-name="Slofeneg" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-so mw-list-item"><a href="https://so.wikipedia.org/wiki/Qarnigii_labaatanaad" title="Qarnigii labaatanaad - Somaleg" lang="so" hreflang="so" data-title="Qarnigii labaatanaad" data-language-autonym="Soomaaliga" data-language-local-name="Somaleg" class="interlanguage-link-target"><span>Soomaaliga</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Shekulli_XX" title="Shekulli XX - Albaneg" lang="sq" hreflang="sq" data-title="Shekulli XX" data-language-autonym="Shqip" data-language-local-name="Albaneg" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/20._%D0%B2%D0%B5%D0%BA" title="20. век - Serbeg" lang="sr" hreflang="sr" data-title="20. век" data-language-autonym="Српски / srpski" data-language-local-name="Serbeg" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-stq mw-list-item"><a href="https://stq.wikipedia.org/wiki/20._Jierhunnert" title="20. Jierhunnert - Ffriseg Saterland" lang="stq" hreflang="stq" data-title="20. Jierhunnert" data-language-autonym="Seeltersk" data-language-local-name="Ffriseg Saterland" class="interlanguage-link-target"><span>Seeltersk</span></a></li><li class="interlanguage-link interwiki-su mw-list-item"><a href="https://su.wikipedia.org/wiki/Abad_ka-20" title="Abad ka-20 - Swndaneg" lang="su" hreflang="su" data-title="Abad ka-20" data-language-autonym="Sunda" data-language-local-name="Swndaneg" class="interlanguage-link-target"><span>Sunda</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/1900-talet" title="1900-talet - Swedeg" lang="sv" hreflang="sv" data-title="1900-talet" data-language-autonym="Svenska" data-language-local-name="Swedeg" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Karne_ya_20" title="Karne ya 20 - Swahili" lang="sw" hreflang="sw" data-title="Karne ya 20" data-language-autonym="Kiswahili" data-language-local-name="Swahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-szl mw-list-item"><a href="https://szl.wikipedia.org/wiki/XX_stole%C4%87e" title="XX stoleće - Silesieg" lang="szl" hreflang="szl" data-title="XX stoleće" data-language-autonym="Ślůnski" data-language-local-name="Silesieg" class="interlanguage-link-target"><span>Ślůnski</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/20-%E0%AE%86%E0%AE%AE%E0%AF%8D_%E0%AE%A8%E0%AF%82%E0%AE%B1%E0%AF%8D%E0%AE%B1%E0%AE%BE%E0%AE%A3%E0%AF%8D%E0%AE%9F%E0%AF%81" title="20-ஆம் நூற்றாண்டு - Tamileg" lang="ta" hreflang="ta" data-title="20-ஆம் நூற்றாண்டு" data-language-autonym="தமிழ்" data-language-local-name="Tamileg" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/20_%E0%B0%B5_%E0%B0%B6%E0%B0%A4%E0%B0%BE%E0%B0%AC%E0%B1%8D%E0%B0%A6%E0%B0%82" title="20 వ శతాబ్దం - Telugu" lang="te" hreflang="te" data-title="20 వ శతాబ్దం" data-language-autonym="తెలుగు" data-language-local-name="Telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-tg mw-list-item"><a href="https://tg.wikipedia.org/wiki/%D0%A1%D0%B0%D0%B4%D0%B0%D0%B8_XX" title="Садаи XX - Tajiceg" lang="tg" hreflang="tg" data-title="Садаи XX" data-language-autonym="Тоҷикӣ" data-language-local-name="Tajiceg" class="interlanguage-link-target"><span>Тоҷикӣ</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%84%E0%B8%A3%E0%B8%B4%E0%B8%AA%E0%B8%95%E0%B9%8C%E0%B8%A8%E0%B8%95%E0%B8%A7%E0%B8%A3%E0%B8%A3%E0%B8%A9%E0%B8%97%E0%B8%B5%E0%B9%88_20" title="คริสต์ศตวรรษที่ 20 - Thai" lang="th" hreflang="th" data-title="คริสต์ศตวรรษที่ 20" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tk mw-list-item"><a href="https://tk.wikipedia.org/wiki/20-nji_asyr" title="20-nji asyr - Tyrcmeneg" lang="tk" hreflang="tk" data-title="20-nji asyr" data-language-autonym="Türkmençe" data-language-local-name="Tyrcmeneg" class="interlanguage-link-target"><span>Türkmençe</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Ika-20_dantaon" title="Ika-20 dantaon - Tagalog" lang="tl" hreflang="tl" data-title="Ika-20 dantaon" data-language-autonym="Tagalog" data-language-local-name="Tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-tly mw-list-item"><a href="https://tly.wikipedia.org/wiki/XX_%C9%99sr" title="XX əsr - Talysheg" lang="tly" hreflang="tly" data-title="XX əsr" data-language-autonym="Tolışi" data-language-local-name="Talysheg" class="interlanguage-link-target"><span>Tolışi</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/20._y%C3%BCzy%C4%B1l" title="20. yüzyıl - Tyrceg" lang="tr" hreflang="tr" data-title="20. yüzyıl" data-language-autonym="Türkçe" data-language-local-name="Tyrceg" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/XX_%D0%B3%D0%B0%D1%81%D1%8B%D1%80" title="XX гасыр - Tatareg" lang="tt" hreflang="tt" data-title="XX гасыр" data-language-autonym="Татарча / tatarça" data-language-local-name="Tatareg" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/XX_%D1%81%D1%82%D0%BE%D0%BB%D1%96%D1%82%D1%82%D1%8F" title="XX століття - Wcreineg" lang="uk" hreflang="uk" data-title="XX століття" data-language-autonym="Українська" data-language-local-name="Wcreineg" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D8%A8%DB%8C%D8%B3%D9%88%DB%8C%DA%BA_%D8%B5%D8%AF%DB%8C" title="بیسویں صدی - Wrdw" lang="ur" hreflang="ur" data-title="بیسویں صدی" data-language-autonym="اردو" data-language-local-name="Wrdw" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/XX_asr" title="XX asr - Wsbeceg" lang="uz" hreflang="uz" data-title="XX asr" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Wsbeceg" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vec mw-list-item"><a href="https://vec.wikipedia.org/wiki/XX_seco%C5%82o" title="XX secoło - Feniseg" lang="vec" hreflang="vec" data-title="XX secoło" data-language-autonym="Vèneto" data-language-local-name="Feniseg" class="interlanguage-link-target"><span>Vèneto</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Th%E1%BA%BF_k%E1%BB%B7_20" title="Thế kỷ 20 - Fietnameg" lang="vi" hreflang="vi" data-title="Thế kỷ 20" data-language-autonym="Tiếng Việt" data-language-local-name="Fietnameg" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-vo mw-list-item"><a href="https://vo.wikipedia.org/wiki/Tumyel_20id" title="Tumyel 20id - Folapük" lang="vo" hreflang="vo" data-title="Tumyel 20id" data-language-autonym="Volapük" data-language-local-name="Folapük" class="interlanguage-link-target"><span>Volapük</span></a></li><li class="interlanguage-link interwiki-wa mw-list-item"><a href="https://wa.wikipedia.org/wiki/20inme_sieke" title="20inme sieke - Walwneg" lang="wa" hreflang="wa" data-title="20inme sieke" data-language-autonym="Walon" data-language-local-name="Walwneg" class="interlanguage-link-target"><span>Walon</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Ika-20_nga_gatostuig" title="Ika-20 nga gatostuig - Winarayeg" lang="war" hreflang="war" data-title="Ika-20 nga gatostuig" data-language-autonym="Winaray" data-language-local-name="Winarayeg" class="interlanguage-link-target"><span>Winaray</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/20%E4%B8%96%E7%BA%AA" title="20世纪 - Wu Tsieineaidd" lang="wuu" hreflang="wuu" data-title="20世纪" data-language-autonym="吴语" data-language-local-name="Wu Tsieineaidd" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-xmf mw-list-item"><a href="https://xmf.wikipedia.org/wiki/XX_%E1%83%9D%E1%83%A8%E1%83%AC%E1%83%90%E1%83%9C%E1%83%A3%E1%83%A0%E1%83%90" title="XX ოშწანურა - Mingrelian" lang="xmf" hreflang="xmf" data-title="XX ოშწანურა" data-language-autonym="მარგალური" data-language-local-name="Mingrelian" class="interlanguage-link-target"><span>მარგალური</span></a></li><li class="interlanguage-link interwiki-yi mw-list-item"><a href="https://yi.wikipedia.org/wiki/20%D7%A1%D7%98%D7%A2%D7%A8_%D7%99%22%D7%94" title="20סטער י"ה - Iddew-Almaeneg" lang="yi" hreflang="yi" data-title="20סטער י"ה" data-language-autonym="ייִדיש" data-language-local-name="Iddew-Almaeneg" class="interlanguage-link-target"><span>ייִדיש</span></a></li><li class="interlanguage-link interwiki-zea mw-list-item"><a href="https://zea.wikipedia.org/wiki/20e_e%C3%AAuw" title="20e eêuw - Zêlandeg" lang="zea" hreflang="zea" data-title="20e eêuw" data-language-autonym="Zeêuws" data-language-local-name="Zêlandeg" class="interlanguage-link-target"><span>Zeêuws</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/20%E4%B8%96%E7%BA%AA" title="20世纪 - Tsieinëeg" lang="zh" hreflang="zh" data-title="20世纪" data-language-autonym="中文" data-language-local-name="Tsieinëeg" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/20_s%C3%A8-k%C3%AD" title="20 sè-kí - Minnan" lang="nan" hreflang="nan" data-title="20 sè-kí" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="Minnan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/20%E4%B8%96%E7%B4%80" title="20世紀 - Cantoneeg" lang="yue" hreflang="yue" data-title="20世紀" data-language-autonym="粵語" data-language-local-name="Cantoneeg" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q6927#sitelinks-wikipedia" title="Golygu dolenni rhyngwici" class="wbc-editpage">Golygu dolenni</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Parthau"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/20fed_ganrif" title="Gweld y dudalen bwnc [c]" accesskey="c"><span>Erthygl</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Sgwrs:20fed_ganrif" rel="discussion" title="Sgwrsio am y dudalen [t]" accesskey="t"><span>Sgwrs</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Newid amrywiad iaith" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Cymraeg</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Golygon"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/20fed_ganrif"><span>Darllen</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=20fed_ganrif&veaction=edit" title="Golygu'r dudalen hon [v]" accesskey="v"><span>Golygu</span></a></li><li id="ca-edit" class="collapsible vector-tab-noicon mw-list-item"><a href="/w/index.php?title=20fed_ganrif&action=edit" title="Golygu cod ffynhonnell y dudalen hon [e]" accesskey="e"><span>Golygu cod</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=20fed_ganrif&action=history" title="Fersiynau cynt o'r dudalen hon. 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vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Blwch offer</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">cuddio</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Rhagor o opsiynau" > <div class="vector-menu-heading"> Gweithredoedd </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/20fed_ganrif"><span>Darllen</span></a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=20fed_ganrif&veaction=edit" title="Golygu'r dudalen hon [v]" accesskey="v"><span>Golygu</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=20fed_ganrif&action=edit" title="Golygu cod ffynhonnell y dudalen hon [e]" accesskey="e"><span>Golygu cod</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=20fed_ganrif&action=history"><span>Gweld hanes</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Cyffredinol </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Arbennig:WhatLinksHere/20fed_ganrif" title="Rhestr o bob tudalen sy'n cysylltu â hon [j]" accesskey="j"><span>Beth sy'n cysylltu yma</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Arbennig:RecentChangesLinked/20fed_ganrif" rel="nofollow" title="Newidiadau diweddar i dudalennau sydd yn cysylltu â hon [k]" accesskey="k"><span>Newidiadau perthnasol</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Arbennig:SpecialPages" title="Rhestr o'r holl dudalennau arbennig [q]" accesskey="q"><span>Tudalennau arbennig</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=20fed_ganrif&oldid=11647603" title="Dolen barhaol i'r fersiwn hwn y dudalen hon"><span>Dolen barhaol</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=20fed_ganrif&action=info" title="Mwy o wybodaeth am y dudalen hon"><span>Gwybodaeth am y dudalen</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Arbennig:CiteThisPage&page=20fed_ganrif&id=11647603&wpFormIdentifier=titleform" title="Gwybodaeth ar sut i gyfeirio at y dudalen hon"><span>Cyfeirio at y dudalen hon</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Arbennig:UrlShortener&url=https%3A%2F%2Fcy.wikipedia.org%2Fwiki%2F20fed_ganrif"><span>Cael URL byr</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Arbennig:QrCode&url=https%3A%2F%2Fcy.wikipedia.org%2Fwiki%2F20fed_ganrif"><span>Lawrlwytho cod QR</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Argraffu / allforio </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Arbennig:Book&bookcmd=book_creator&referer=20fed+ganrif"><span>Llunio llyfr</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Arbennig:DownloadAsPdf&page=20fed_ganrif&action=show-download-screen"><span>Lawrlwytho fel PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=20fed_ganrif&printable=yes" title="Cynhyrchwch fersiwn o'r dudalen yn barod at ei hargraffu [p]" accesskey="p"><span>Fersiwn argraffu</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> Mewn prosiectau eraill </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:20th_century" hreflang="en"><span>Comin Wikimedia</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q6927" title="Cysylltu i eitem ystorfa gysylltiedig [g]" accesskey="g"><span>Eitem Wicidata</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Offer tudalen"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Gwedd"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Gwedd</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">cuddio</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Oddi ar Wicipedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><span class="mw-redirectedfrom">(Ailgyfeiriad o <a href="/w/index.php?title=20g&redirect=no" class="mw-redirect" title="20g">20g</a>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="cy" dir="ltr"><b></b><b></b><table class="infobox" style="font-size: 90%; text-align: left; width: 19em"> <tbody><tr> <td style="font-size: 110%; background:#ffcccc;" align="center" colspan="2"><b>Adnoddau Dysgu</b> </td></tr> <tr> <th><span typeof="mw:File"><span><video id="mwe_player_0" poster="//upload.wikimedia.org/wikipedia/commons/thumb/f/f8/Hanes_y_20fed_ganrif.webm/250px--Hanes_y_20fed_ganrif.webm.jpg" controls="" preload="none" data-mw-tmh="" class="mw-file-element" width="250" height="141" data-durationhint="150" data-mwtitle="Hanes_y_20fed_ganrif.webm" data-mwprovider="wikimediacommons"><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/f/f8/Hanes_y_20fed_ganrif.webm/Hanes_y_20fed_ganrif.webm.480p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="480p.vp9.webm" data-width="854" data-height="480" /><source src="//upload.wikimedia.org/wikipedia/commons/f/f8/Hanes_y_20fed_ganrif.webm" type="video/webm; codecs="vp8, vorbis"" data-width="1920" data-height="1080" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/f/f8/Hanes_y_20fed_ganrif.webm/Hanes_y_20fed_ganrif.webm.720p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="720p.vp9.webm" data-width="1280" data-height="720" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/f/f8/Hanes_y_20fed_ganrif.webm/Hanes_y_20fed_ganrif.webm.1080p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="1080p.vp9.webm" data-width="1920" data-height="1080" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/f/f8/Hanes_y_20fed_ganrif.webm/Hanes_y_20fed_ganrif.webm.144p.mjpeg.mov" type="video/quicktime" data-transcodekey="144p.mjpeg.mov" data-width="256" data-height="144" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/f/f8/Hanes_y_20fed_ganrif.webm/Hanes_y_20fed_ganrif.webm.240p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="240p.vp9.webm" data-width="426" data-height="240" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/f/f8/Hanes_y_20fed_ganrif.webm/Hanes_y_20fed_ganrif.webm.360p.webm" type="video/webm; codecs="vp8, vorbis"" data-transcodekey="360p.webm" data-width="640" data-height="360" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/f/f8/Hanes_y_20fed_ganrif.webm/Hanes_y_20fed_ganrif.webm.360p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="360p.vp9.webm" data-width="640" data-height="360" /></video></span></span> </th></tr> <tr> <th style="font-size: 100%;" align="center" colspan="2">Rhestr o adnoddau dysgu ar gyfer y pwnc yma </th></tr> <tr> <td style="font-size: 110%; background:#ccddff;" align="center" colspan="2"><b>CBAC</b> </td></tr> <tr> <th><a rel="nofollow" class="external text" href="http://resource.download.wjec.co.uk.s3.amazonaws.com/vtc/2016-17/16-17_2-15/cym/Datblygu-rhyfela.pdf">Datblygu Rhyfela</a> </th></tr> <tr> <th> </th></tr> <tr> <th> </th></tr> <tr><td colspan="1" style="border-top: solid 1px #ccd2d9; padding: 0.4em 1em 0.4em 0;" align="center"><small>Adolygwyd testun yr erthygl hon gan arbenigwyr pwnc ac mae'n addas i'w ddefnyddio mewn addysg</small></td></tr> </tbody></table> <p>Yn ystod yr <b>20g</b> bu newidiadau pellgyrhaeddol a thrawsnewidiol yn hanes y byd. Cafwyd nifer o ddigwyddiadau pwysig a newidiodd y byd am byth, gan gynnwys <a href="/wiki/Y_Rhyfel_Byd_Cyntaf" title="Y Rhyfel Byd Cyntaf">y Rhyfel Byd</a> <a href="/wiki/Y_Rhyfel_Byd_Cyntaf" title="Y Rhyfel Byd Cyntaf">Cyntaf</a> a’r <a href="/wiki/Yr_Ail_Ryfel_Byd" title="Yr Ail Ryfel Byd">Ail Ryfel Byd</a>, twf <a href="/wiki/Ynni_niwclear" title="Ynni niwclear">pŵer niwclear</a>, teithiau i’r <a href="/wiki/Y_gofod" title="Y gofod">gofod</a>, twf <a href="/wiki/Cenedlaetholdeb" title="Cenedlaetholdeb">cenedlaetholdeb</a> a gwledydd yn dod yn annibynnol o drefedigaethau, <a href="/wiki/Y_Rhyfel_Oer" title="Y Rhyfel Oer">y Rhyfel Oer</a>, datblygiadau mewn trafnidiaeth a thechnoleg cyfathrebu, twf enfawr yn y boblogaeth ledled y byd, ymwybyddiaeth o ddirywiad yn <a href="/wiki/Amgylchedd" title="Amgylchedd">amgylchedd</a> ac ecoleg y byd, a’r Chwyldro Digidol.  Roedd yn gyfnod lle gwelwyd cynnydd a datblygiad ar raddfa gyflym, yn enwedig ym meysydd <a href="/wiki/Technoleg" title="Technoleg">technoleg</a> feddygol. Cafwyd darganfyddiadau <a href="/wiki/Geneteg" title="Geneteg">geneteg</a> a oedd yn trawsnewid hanes y <a href="/wiki/Dynoliaeth" title="Dynoliaeth">ddynoliaeth</a> ac fe wnaeth y defnydd o <a href="/wiki/Cyfrifiadur" title="Cyfrifiadur">gyfrifiaduron</a> weddnewid bywyd ar draws y byd. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Rhyfeloedd_a_Gwleidyddiaeth">Rhyfeloedd a Gwleidyddiaeth</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=1" title="Golygu'r adran: Rhyfeloedd a Gwleidyddiaeth" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=1" title="Edit section's source code: Rhyfeloedd a Gwleidyddiaeth"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Bu farw miliynau o bobl yn ystod y ganrif ar raddfa na welwyd erioed mo’i debyg. Achoswyd y marwolaethau hyn gan <a href="/wiki/Ryfel" class="mw-redirect" title="Ryfel">ryfeloedd</a>, <a href="/wiki/Hil-laddiad" title="Hil-laddiad">hil-laddiad</a>, cyfundrefnau gwleidyddol, milwrol ac unbenaethol a <a href="/wiki/Llofruddiaeth" title="Llofruddiaeth">llofruddiaethau</a> ar raddfa eang. Amcangyfrifir bod rhwng 50 ac 80 miliwn wedi marw oherwydd sgil effeithiau'r ddau ryfel byd yn unig. Amcangyfrifir bod 70 miliwn o Ewropeaid wedi marw oherwydd rhyfel, trais a newyn rhwng <a href="/wiki/1914" title="1914">1914</a> a <a href="/wiki/1945" title="1945">1945</a>. </p><p>Gwelodd yr 20g ddau ryfel diarbed byd-eang rhwng arch-bwerau’r byd. Gwasgarwyd meysydd ymladd y Rhyfel Byd Cyntaf a’r Ail Ryfel Byd ar draws cyfandiroedd a moroedd ledled y byd. Roedd hon yn ganrif lle gwelwyd twf <a href="/wiki/Cenedlaetholdeb" title="Cenedlaetholdeb">cenedlaetholdeb</a> mewn gwahanol wledydd, gyda gwledydd yn hawlio hunanlywodraeth, a phan gafodd ymerodraethau eu chwalu. Ar ôl y Rhyfel Byd Cyntaf cafodd ymerodraethau <a href="/wiki/Ymerodraeth_yr_Otomaniaid" class="mw-redirect" title="Ymerodraeth yr Otomaniaid">Otoman</a> ac <a href="/wiki/Awstria-Hwngari" title="Awstria-Hwngari">Awstria-Hwngari</a> eu diddymu, diorseddwyd <a href="/wiki/Niclas_II,_tsar_Rwsia" title="Niclas II, tsar Rwsia">Tsar Nicholas II</a> gan y <a href="/wiki/Chwyldro_Rwsiaidd" class="mw-redirect" title="Chwyldro Rwsiaidd">Chwyldro Rwsiaidd</a> yn 1917 a chafodd y wladwriaeth Gomiwnyddol gyntaf ei sefydlu yn Rwsia. </p> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/Delwedd:Vickers_machine_gun_in_the_Battle_of_Passchendaele_-_September_1917.jpg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/af/Vickers_machine_gun_in_the_Battle_of_Passchendaele_-_September_1917.jpg/220px-Vickers_machine_gun_in_the_Battle_of_Passchendaele_-_September_1917.jpg" decoding="async" width="220" height="159" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/af/Vickers_machine_gun_in_the_Battle_of_Passchendaele_-_September_1917.jpg/330px-Vickers_machine_gun_in_the_Battle_of_Passchendaele_-_September_1917.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/af/Vickers_machine_gun_in_the_Battle_of_Passchendaele_-_September_1917.jpg/440px-Vickers_machine_gun_in_the_Battle_of_Passchendaele_-_September_1917.jpg 2x" data-file-width="3433" data-file-height="2480" /></a><figcaption>Cafodd <a href="/wiki/Dryll_awtomatig" title="Dryll awtomatig">drylliau awtomatig</a> eu defnyddio ar raddfa fawr am y try cyntaf yn y Rhyfel Byd Cyntaf a arweiniodd at nifer fawr o anafusion</figcaption></figure> <p>Dynododd y Rhyfel Byd Cyntaf drobwynt o ran dulliau rhyfela. Achosodd datblygiadau technolegol newidiadau mawr yn y ffordd roedd rhyfel yn cael ei ymladd a sut roedd yn effeithio ar sifiliaid. Defnyddiwyd dyfeisiadau newydd fel y <a href="/wiki/Tanc" title="Tanc">tanc</a>, <a href="/wiki/Arfau_cemegol" class="mw-redirect" title="Arfau cemegol">arfau cemegol</a> fel clorin a nwy mwstard, <a href="/wiki/Llong_danfor" title="Llong danfor">llongau tanfor</a>, a chyflwynwyd <a href="/wiki/Awyrennau" class="mw-redirect" title="Awyrennau">awyrennau</a> i faes y gad yn ystod hanner cyntaf yr 20g.  Achosodd y rhain newidiadau yn nhactegau ymladd rhyfeloedd modern. Nododd y defnydd o arfau niwclear yn <a href="/wiki/Hiroshima" title="Hiroshima">Hiroshima</a> a <a href="/wiki/Nagasaki" title="Nagasaki">Nagasaki</a> yn Awst 1945 gychwyn cyfnod newid o ryfela modern. </p><p>Bu rhyfeloedd cartref mewn llawer o wledydd. Bu rhyfel cartref treisgar yn <a href="/wiki/Sbaen" title="Sbaen">Sbaen</a> yn 1936 pan arweiniodd y Cadfridog <a href="/wiki/Franco" class="mw-redirect" title="Franco">Franco</a> wrthryfel yn erbyn Ail Weriniaeth Sbaen, sef y llywodraeth ddemocrataidd a fu’n rheoli’r wlad rhwng 1931 a 1939. Gwelwyd y gwrthryfel fel arwydd o’r tensiynau cynyddol oedd yn Ewrop cyn cychwyn yr Ail Ryfel Byd. Bu <a href="/wiki/Dirwasgiad_Mawr" title="Dirwasgiad Mawr">Dirwasgiad Mawr</a> y 1930au yn ffactor pwysig a arweiniodd at dwf ym mhoblogrwydd <a href="/wiki/Ffasgaeth" title="Ffasgaeth">Ffasgaeth</a> a <a href="/wiki/Nats%C3%AFaeth" title="Natsïaeth">Natsïaeth</a> yn Ewrop. </p><p>Effeithiodd yr Ail Ryfel Byd (1939-1945) ar <a href="/wiki/Dwyrain_Asia" title="Dwyrain Asia">Ddwyrain Asia</a> a’r <a href="/wiki/Y_Cefnfor_Tawel" title="Y Cefnfor Tawel">Cefnfor tawel</a> oherwydd ymosodiad <a href="/wiki/Siapan" class="mw-redirect" title="Siapan">Siapan</a> yn erbyn <a href="/wiki/Tseina" class="mw-redirect" title="Tseina">Tseina</a> a’r <a href="/wiki/Unol_Daleithiau" class="mw-redirect" title="Unol Daleithiau">Unol Daleithiau</a>. Cafodd sifiliaid eu heffeithio yn llawer mwy yn ystod yr Ail Ryfel Byd oherwydd bomio o’r awyr ar ardaloedd poblog fel dinasoedd a threfi gan y ddwy ochr, er enghraifft, Brwydr Prydain a’r <a href="/wiki/Y_Blitz" title="Y Blitz">Blitz</a> gan <a href="/wiki/Yr_Almaen" title="Yr Almaen">yr Almaen</a> yn erbyn Prydain a’r dacteg bomio carped a ddefnyddiwyd gan Brydain ar ddinasoedd fel <a href="/wiki/Dresden" title="Dresden">Dresden</a>, <a href="/wiki/Cologne" class="mw-redirect" title="Cologne">Cologne</a> a <a href="/wiki/Berlin" title="Berlin">Berlin</a> yn yr Almaen; a hil-laddiad yr <a href="/wiki/Iddewon" title="Iddewon">Iddewon</a> gan yr Almaen, sef yr <a href="/wiki/Holocost" class="mw-redirect" title="Holocost">Holocost</a>. </p><p>Ar ôl y Rhyfel Byd Cyntaf, gwelwyd sefydlu <a href="/wiki/Comiwnyddiaeth" title="Comiwnyddiaeth">Comiwnyddiaeth</a> fel cyfundrefn wleidyddol mewn llawer o wledydd ar draws y byd.  Yn sgil y Chwyldro Comiwnyddol yn Rwsia yn 1917 llofruddiwyd teulu brenhinol y <a href="/wiki/Rozanov_Vladimir_Nikolaevich" title="Rozanov Vladimir Nikolaevich">Romanovs</a> gan y <a href="/wiki/Bolsiefic" title="Bolsiefic">Bolsieficiaid</a> a chrëwyd llywodraeth Gomiwnyddol newydd o dan arweinyddiaeth <a href="/wiki/Vladimir_Lenin" title="Vladimir Lenin">Vladimir Lenin</a>.  Roedd 300 mlynedd o deyrnasiad brenhinol wedi dod i ben ac yn lle hynny crëwyd gwladwriaeth Gomiwnyddol gyntaf y byd. Ar ôl rôl yr <a href="/wiki/Yr_Undeb_Sofietaidd" title="Yr Undeb Sofietaidd">Undeb Sofietaidd</a> yn yr Ail Ryfel Byd, daeth comiwnyddiaeth yn bŵer pwysig mewn gwleidyddiaeth fyd-eang. Sefydlwyd llywodraethau comiwnyddol, er enghraifft yn Nwyrain Ewrop (er enghraifft, <a href="/wiki/Hwngari" title="Hwngari">Hwngari</a>, <a href="/wiki/Gweriniaeth_Ddemocrataidd_yr_Almaen" title="Gweriniaeth Ddemocrataidd yr Almaen">Dwyrain yr Almaen</a>, <a href="/wiki/Rwmania" title="Rwmania">Rwmania</a>), <a href="/wiki/Tsieina" title="Tsieina">Tseina</a>, <a href="/wiki/Indo-Tsieina" title="Indo-Tsieina">Indo-Tsieina</a>, a <a href="/wiki/Ciwba" title="Ciwba">Chiwba</a>. Roedd gan Gomiwnyddiaeth bŵer absoliwt, bron, yn llawer o’r gwledydd a’r ardaloedd hyn. </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Delwedd:Atomic_bombing_of_Japan.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/54/Atomic_bombing_of_Japan.jpg/220px-Atomic_bombing_of_Japan.jpg" decoding="async" width="220" height="131" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/54/Atomic_bombing_of_Japan.jpg/330px-Atomic_bombing_of_Japan.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/54/Atomic_bombing_of_Japan.jpg/440px-Atomic_bombing_of_Japan.jpg 2x" data-file-width="4918" data-file-height="2918" /></a><figcaption>Gollwng y ddau fom atomig ar Siapan</figcaption></figure> <p>Trechwyd yr Almaen yn 1945 wedi iddi gael ei goresgyn gan yr Undeb Sofietaidd a Gwlad Pwyl o gyfeiriad y dwyrain a’r Unol Daleithiau, Prydain, Canada a Ffrainc o’r gorllewin.  Wedi buddugoliaeth y Cynghreiriaid yn Ewrop daeth y rhyfel yn Asia yn erbyn Siapan i ben yn sgil gollwng dau fom atomig gan yr Unol Daleithiau ar Hiroshima a Nagasaki. Ar ôl y rhyfel rhannwyd yr Almaen rhwng y Pwerau Gorllewinol a’r Undeb Sofietaidd. </p><p>O hynny ymlaen daeth Dwyrain yr Almaen a gweddill gwledydd dwyrain Ewrop yn llywodraethau Comiwnyddol. Yng Ngorllewin yr Almaen sefydlwyd llywodraeth ddemocrataidd debyg i’r gwledydd gorllewinol. Ail-adeiladwyd gorllewin Ewrop gyda chymorth ariannol Cynllun Marshall America ac felly daeth America yn gyfaill agos i’r gorllewin. </p> <figure class="mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/Delwedd:VNC_Female.jpg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/9/95/VNC_Female.jpg/180px-VNC_Female.jpg" decoding="async" width="180" height="268" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/95/VNC_Female.jpg/270px-VNC_Female.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/95/VNC_Female.jpg/360px-VNC_Female.jpg 2x" data-file-width="538" data-file-height="800" /></a><figcaption>Sifiliad benywaidd o Fietnam, tua 1967. Gan y ffotograffydd Cymraeg <a href="/wiki/Philip_Jones_Griffiths" title="Philip Jones Griffiths">Phillip Jones Griffiths</a></figcaption></figure> <p>Ar ôl yr Ail Ryfel Byd trodd y cydweithio rhwng yr Unol Daleithiau a’r Undeb Sofietaidd yn berthynas fwy gelyniaethus a drwgdybus. Dyma gyfnod y Rhyfel Oer. Roedd yn ffactor yn achosi’r rhyfeloedd yng ngwledydd <a href="/wiki/Rhyfel_Corea" title="Rhyfel Corea">Corea</a> (1950-53) a <a href="/wiki/Rhyfel_Fietnam" title="Rhyfel Fietnam">Fietnam</a> (1957-1975). </p><p>Cynrychiolai’r ddau arch-bwer syniadau gwleidyddol gwahanol rhwng cyfalafiaeth a democratiaeth, a chafodd Ewrop ei rhannu gan y Llen Haearn. Rhannwyd Berlin gan <a href="/wiki/Mur_Berlin" title="Mur Berlin">Fur Berlin</a> oedd yn gwahanu’r rhanbarth gorllewinol, democrataidd oddi wrth y rhanbarth dwyreiniol, comiwnyddol.  Ffurfiodd y ddwy ochr gynghreiriau milwrol, sef <a href="/wiki/NATO" class="mw-redirect" title="NATO">NATO</a> a <a href="/wiki/Cytundeb_Warsaw" title="Cytundeb Warsaw">Chytundeb Warsaw</a>; datblygodd ras arfau gyda phwyslais ar ddatblygiad arfau niwclear a bu cystadleuaeth rhwng y ddau arch-bwer yn y ras i’r gofod.   </p><p>Dymchwelwyd Wal Berlin adeg Chwyldroadau 1989 yn Ewrop gan greu Almaen unedig yn 1990, a chwalodd yr Undeb Sofietaidd yn 1991. Roedd 1989 yn flwyddyn lle gwelwyd dymchwel llywodraethau comiwnyddol ar draws y byd. Chwalwyd llawer o’r llywodraethau comiwnyddol roedd yr Undeb Sofietaidd wedi eu cefnogi ar draws y byd heblaw am <a href="/wiki/Tsieina" title="Tsieina">Tsiena</a>, <a href="/wiki/Gogledd_Corea" title="Gogledd Corea">Gogledd Corea</a>, <a href="/wiki/Ciwba" title="Ciwba">Ciwba</a>, <a href="/wiki/Fietnam" title="Fietnam">Fietnam</a> a <a href="/wiki/Laos" title="Laos">Laos</a>. Roedd <a href="/wiki/Protestiadau_Sgw%C3%A2r_Tiananmen,_1989" class="mw-redirect" title="Protestiadau Sgwâr Tiananmen, 1989">Protestiadau Sgwâr Tiananmen</a> yn 1989 yn brotestiadau treisgar lle lladdwyd cannoedd o brotestwyr yn Sgwâr Tiananmen, Beijing, Tseina mewn ymdrech i ddymchwel y llywodraeth gomiwnyddol.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>Methodd y Rhyfel Byd Cyntaf neu’r ‘rhyfel i orffen pob rhyfel’ sicrhau heddwch. Disgrifiwyd yr Ail Ryfel Byd fel busnes anorffenedig y Rhyfel Byd Cyntaf. Yn dilyn y ddau ryfel byd ffurfiwyd Cynghrair y Cenhedloedd ac yna'r Cenhedloedd Unedig. Sefydlwyd Cynghrair y Cenhedloedd yn 1919 ar ôl y Rhyfel Byd Cyntaf ac yna disodlwyd ef gan y Cenhedloedd Unedig yn 1945 ar ôl yr Ail Ryfel Byd.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Roedd hwn yn fforwm rhyngwladol lle gallai gwledydd y byd drafod materion a oedd yn peryglu heddwch byd-eang; trafod materion diplomyddol, trafod canllawiau ynghylch rheolau rhyfel, sut i amddiffyn yr amgylchedd, sofraniaeth gwledydd a hawliau dynol. Roedd lluoedd cadw heddwch y Cenhedloedd Unedig (oedd yn cynnwys milwyr gwahanol aelodau’r Cenhedloedd Unedig) ac asiantaethau eraill y Cenhedloedd Unedig yn rhoi cymorth mewn gwahanol ardaloedd argyfyngus ar draws y byd.  Roeddent yn helpu i leihau newyn, afiechydon a thlodi. Methodd sefydliadau fel Cynghrair y Cenhedloedd a’i olynydd y Cenhedloedd Unedig ag atal rhyfeloedd. Ers 1945, fodd bynnag, does dim rhyfel wedi bod rhwng y pwerau mawr gan fod y syniad o Gyd–ddinistr Sicr (<i>MAD: Mutually Assured Destruction</i>) wedi llwyddo i atal rhyfel. Yn y cyfnod ar ôl 1945 mae 9 rhyfel o bob 10 wedi digwydd mewn gwledydd gwan, ansefydlog yn y Trydydd Byd.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>Arweiniodd mwy o gydweithrediad rhwng y gwledydd at ddatblygiad yr <a href="/wiki/Yr_Undeb_Ewropeaidd" title="Yr Undeb Ewropeaidd">Undeb Ewropeaidd</a> yn ystod y 1950au. Roedd hwn yn grŵp o wledydd yn Ewrop a oedd yn cydweithio yn wleidyddol, yn economaidd ac yn fasnachol. </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Delwedd:Mahatma-Gandhi,_studio,_1931.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7a/Mahatma-Gandhi%2C_studio%2C_1931.jpg/220px-Mahatma-Gandhi%2C_studio%2C_1931.jpg" decoding="async" width="220" height="275" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7a/Mahatma-Gandhi%2C_studio%2C_1931.jpg/330px-Mahatma-Gandhi%2C_studio%2C_1931.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7a/Mahatma-Gandhi%2C_studio%2C_1931.jpg/440px-Mahatma-Gandhi%2C_studio%2C_1931.jpg 2x" data-file-width="2620" data-file-height="3270" /></a><figcaption>Mahatma Gandhi</figcaption></figure> <p>Roedd dulliau heddychlon <a href="/wiki/Mahatma_Gandhi" title="Mahatma Gandhi">Gandhi</a> a’r mudiad i sicrhau annibyniaeth i <a href="/wiki/India" title="India">India</a> oddi ar <a href="/wiki/Yr_Ymerodraeth_Brydeinig" title="Yr Ymerodraeth Brydeinig">Ymerodraeth Prydain</a> yn ddylanwad mawr ar ddulliau protestio mudiadau gwleidyddol eraill ar draws y byd, er enghraifft, y Mudiad Hawliau Sifil yn America a’r mudiadau rhyddid yn <a href="/wiki/De_Affrica" title="De Affrica">ne Affrica</a> a <a href="/wiki/Myanmar" title="Myanmar">Burma</a>. Bu mudiadau cenedlaetholgar yn bwysig yn yr ymgyrch i sicrhau annibyniaeth i India a <a href="/wiki/Pacistan" title="Pacistan">Phakistan</a> yn 1947. Yn y <a href="/wiki/Y_Dwyrain_Canol" title="Y Dwyrain Canol">Dwyrain Canol</a> yn 1948 crëwyd gwladwriaeth Iddewig newydd, <a href="/wiki/Israel" title="Israel">Israel</a>. Roedd chwalfa llawer o ymerodraethau wedi arwain at annibyniaeth i lawer o wledydd yn Affrica ac Asia. </p><p>Yn ystod y 1950au a’r 1960au heriodd y Mudiad Hawliau Sifil yn America dan arweiniad <a href="/wiki/Martin_Luther_King" title="Martin Luther King">Martin Luther King</a> a’r mudiad yn erbyn apartheid yn ne Affrica o dan arweiniad <a href="/wiki/Nelson_Mandela" title="Nelson Mandela">Nelson Mandela</a> yr arwahanu hiliol a oedd yn digwydd yn y gwledydd hynny. Bu’n ymgyrch a barhaodd ar hyd gweddill y ganrif yn y ddwy wlad.  Un o’r cerrig milltir pwysig ym mrwydr de Affrica oedd ethol Nelson Mandela yn Arlywydd du cyntaf De Affrica rhwng 1994-1999.  Etholwyd ef yn yr etholiad democrataidd llawn cyntaf yn hanes de Affrica. </p><p>Bu farw degau o filiynau o daeogion Tsieineaidd rhwng 1959 a 1962 oherwydd Newyn Mawr Tsieina. Credir mai hwn oedd y newyn mwyaf yn hanes y ddynoliaeth. </p><p>Achosodd y Rhyfel Sofietaidd yn <a href="/wiki/Affganistan" title="Affganistan">Affghanistan</a> rhwng 1979 a 1989, dros filiwn o farwolaethau, ac roedd yn un o’r rhesymau pam chwalodd yr Undeb Sofietaidd. </p> <div class="mw-heading mw-heading2"><h2 id="Cerddoriaeth">Cerddoriaeth</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=2" title="Golygu'r adran: Cerddoriaeth" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=2" title="Edit section's source code: Cerddoriaeth"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Delwedd:The_Beatles_(with_Jimmy_Nicol)_1964_001.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1c/The_Beatles_%28with_Jimmy_Nicol%29_1964_001.png/220px-The_Beatles_%28with_Jimmy_Nicol%29_1964_001.png" decoding="async" width="220" height="144" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/1c/The_Beatles_%28with_Jimmy_Nicol%29_1964_001.png/330px-The_Beatles_%28with_Jimmy_Nicol%29_1964_001.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/1c/The_Beatles_%28with_Jimmy_Nicol%29_1964_001.png/440px-The_Beatles_%28with_Jimmy_Nicol%29_1964_001.png 2x" data-file-width="500" data-file-height="327" /></a><figcaption><a href="/wiki/The_Beatles" title="The Beatles">The Beatles</a> oedd un o fandiau enwocaf yr 20fed ganrif</figcaption></figure> <p>Daeth cerddoriaeth <i><a href="/wiki/Y_felan" title="Y felan">blues</a></i> a <i><a href="/wiki/Jazz" title="Jazz">jazz</a></i> yn boblogaidd yn yr Unol Daleithiau yn ystod y 1910au a’r 1920au. </p><p>Yn y 1950au daeth <a href="/wiki/Roc_a_r%C3%B4l" class="mw-redirect" title="Roc a rôl">Roc a Rôl</a> yn boblogaidd yn yr Unol Daleithiau, a Jerry Lee Lewis ac <a href="/wiki/Elvis_Presley" title="Elvis Presley">Elvis Presley</a> yn dod yn rhai o eiconau’r cyfnod. Yn ystod y 1960au daeth <a href="/wiki/The_Beatles" title="The Beatles">The Beatles</a> yn fyd-enwog am eu caneuon poblogaidd wedi eu dylanwadu gan roc a rôl.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p><p>O ganol yr 20g ymlaen daeth ‘roc a rôl’, cerddoriaeth werinol/roc, metal trwm a <a href="/wiki/Pync-roc" title="Pync-roc">phync roc</a> yn rhan o gerddoriaeth boblogaidd. Yn y 1980au a’r 1990au daeth <a href="/wiki/Hip_hop" title="Hip hop">hip hop</a> yn boblogaidd.  Ar yr un adeg datblygwyd cerddoriaeth <i>house</i>, <i>techno</i>, <i><a href="/wiki/Reggae" title="Reggae">reggae</a></i> a <i><a href="/wiki/Cerddoriaeth_yr_enaid" title="Cerddoriaeth yr enaid">soul</a></i>. Dechreuwyd defnyddio syntheseiswyr mewn cerddoriaeth, gyda hynny'n trosi i gerddoriaeth boblogaidd yn y 1980au ar ffurf cerddoriaeth ‘<i>new wave’</i>.  Cafodd offerynnau electronig ddylanwad ar bob math o gerddoriaeth boblogaidd, ac arweiniodd hynny at ddyfeisio <i>genres</i> (mathau) newydd o gerddoriaeth, fel <i>house</i>, <i>synthpop</i>, <i><a href="/wiki/Cerddoriaeth_dawns_electronig" title="Cerddoriaeth dawns electronig">cerddoriaeth dawns electronig</a></i> a <i>cherddoriaeth ddiwydiannol</i>.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Ffilm,_theatr_a_theledu"><span id="Ffilm.2C_theatr_a_theledu"></span>Ffilm, theatr a theledu</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=3" title="Golygu'r adran: Ffilm, theatr a theledu" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=3" title="Edit section's source code: Ffilm, theatr a theledu"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure typeof="mw:File/Thumb"><a href="/wiki/Delwedd:The_Jazz_Singer_1927_Poster.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d2/The_Jazz_Singer_1927_Poster.jpg/153px-The_Jazz_Singer_1927_Poster.jpg" decoding="async" width="153" height="232" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d2/The_Jazz_Singer_1927_Poster.jpg/229px-The_Jazz_Singer_1927_Poster.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d2/The_Jazz_Singer_1927_Poster.jpg/305px-The_Jazz_Singer_1927_Poster.jpg 2x" data-file-width="873" data-file-height="1326" /></a><figcaption>Poster ar gyfer 'The Jazz Singer' 1927</figcaption></figure> <p>Cafodd <a href="/wiki/Ffilm" title="Ffilm">ffilm</a> ei greu fel cyfrwng artistig yn ystod yr 20g. Agorwyd y <a href="/wiki/Sinema" title="Sinema">sinema</a> gyntaf yn <a href="/wiki/Pittsburgh" title="Pittsburgh">Pittsburgh</a> yn 1905. </p><p>Datblygodd <a href="/wiki/Hollywood" title="Hollywood">Hollywood</a> yn Los Angeles i fod yn ganolfan ar gyfer y diwydiant ffilmiau. Tra bod y ffilmiau cyntaf yn rhai du a gwyn, erbyn y 1920au datblygwyd ‘<i>Technicolor</i>’ i greu ffilmiau lliw.  Rhyddhawyd y ffilm hir gyntaf gyda sain, sef <a href="/wiki/The_Jazz_Singer_(ffilm_1927)" title="The Jazz Singer (ffilm 1927)">The Jazz Singer</a>, yn 1927. Sefydlwyd Gwobrau Academi yr <a href="/wiki/Gwobrau%27r_Academi" title="Gwobrau'r Academi">Oscars</a> yn 1929. </p><p>Datblygwyd animeiddio yn ystod y 1920au. <a href="/wiki/Snow_White_and_the_Seven_Dwarfs_(ffilm_1937)" title="Snow White and the Seven Dwarfs (ffilm 1937)">Snow White and the Seven Dwarfs</a> oedd y ffilm hir gyntaf wedi ei hanimeiddio. Rhyddhawyd y ffilm yn 1937. Datblygwyd CGI yn ystod y 1980au. Y ffilm hir CGI gyntaf gydag animeiddio yn rhan ohoni oedd <a href="/wiki/Toy_Story" title="Toy Story">Toy Story</a> a ryddhawyd yn 1995. </p><p>Yn y theatr, daeth <a href="/wiki/Broadway" title="Broadway">Broadway</a> yn <a href="/wiki/Dinas_Efrog_Newydd" title="Dinas Efrog Newydd">Efrog Newydd</a> yn ganolfan bwysig yn fyd-eang ar gyfer awduron drama ac ar gyfer theatr gerddorol.  Cafodd gwaith awduron fel <a href="/wiki/Arthur_Miller" title="Arthur Miller">Arthur Miller</a> a <a href="/wiki/Tennessee_Williams" title="Tennessee Williams">Tennessee Williams</a> ei berfformio ar Broadway ac roedd cyfansoddwyr fel Rodgers and Hammerstein, Lerner and Loewe ac Irving Berlin yn ddylanwadau pwysig ar y diwydiant a’r diwylliant ffilm.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Gemau_Fideo">Gemau Fideo</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=4" title="Golygu'r adran: Gemau Fideo" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=4" title="Edit section's source code: Gemau Fideo"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Gyda datblygiadau technolegol mewn cyfrifiaduron ers yr Ail Ryfel Byd, crëwyd math newydd o adloniant yn yr 20g – sef y <a href="/wiki/G%C3%AAm_fideo" title="Gêm fideo">gêm fideo</a>. Tra bod y syniad o gemau fideo wedi cael eu llunio yn ystod y 1940au a'r 50au, ni wnaeth gemau fideo ddatblygu fel diwydiant a busnes tan y 1970au.   Roedd hwn yn ffenomenon cymdeithasol a diwylliannol ac yn gychwyn ar oes aur gemau fideo arcêd – dyma’r cyfnod pan ryddhawyd <i><a href="/wiki/Space_Invaders" title="Space Invaders">Space Invaders</a></i> gan Taito, <i>Asteroids</i> gan Atari a <i>Pac-Man</i> gan Namco. </p><p>Cafodd cwmni <a href="/wiki/Nintendo" title="Nintendo">Nintendo</a> lwyddiant ysgubol gyda gwerthiant gêm <i>Super Mario Bros</i> ar draws y byd. Yn ystod y 1990au rhyddhawyd pecyn gêm fideo <i>PlayStation</i> gan Sony gyda gwerthiant yn cyrraedd 100 miliwn. Roedd gemau fideo mor boblogaidd fel bod y diwydiant wedi creu swyddi newydd - er enghraifft, cynllunwyr gemau fideo. </p> <div class="mw-heading mw-heading2"><h2 id="Celf_a_Phensaernïaeth"><span id="Celf_a_Phensaern.C3.AFaeth"></span>Celf a Phensaernïaeth</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=5" title="Golygu'r adran: Celf a Phensaernïaeth" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=5" title="Edit section's source code: Celf a Phensaernïaeth"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure typeof="mw:File/Thumb"><a href="/wiki/Delwedd:Juan_Gris_003.jpg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/1/12/Juan_Gris_003.jpg/170px-Juan_Gris_003.jpg" decoding="async" width="170" height="246" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/12/Juan_Gris_003.jpg/255px-Juan_Gris_003.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/12/Juan_Gris_003.jpg/340px-Juan_Gris_003.jpg 2x" data-file-width="1576" data-file-height="2277" /></a><figcaption>Roedd datblygiadau mawr yn y byd celf yn ystod yr 20fed Ganrif. Juan Gris, <i>Bywyd llonydd gyda Bowlen o Ffrwythau a Mandolin</i>, 1919.</figcaption></figure> <p>Datblygodd ffurfiau a steiliau newydd o gelfyddyd fel <a href="/wiki/Mynegiadaeth" title="Mynegiadaeth">Mynegiadaeth</a> (Saesneg:<i>Expressionism</i>), <a href="/wiki/Dada" title="Dada">Dada</a> (Saesneg:<i>Dadaism),</i> <a href="/wiki/Ciwbiaeth" title="Ciwbiaeth">Ciwbiaeth</a> (Saesneg:<i>Cubism</i>), <a href="/wiki/Swrealaeth" title="Swrealaeth">Swrealaeth</a>, (Seasneg:<i>Surrealism</i>), <a href="/wiki/Celf_bop" title="Celf bop">Celf bop</a> (Saesneg:<i>Pop Art</i>) a chelf gysyniadaol (Saesneg:<i>Conceptual art</i>). Roedd y syniadau newydd hyn yn bwysig yn natblygiad Moderniaeth. </p><p>Yn Ewrop, datblygodd pensaernïaeth fodern mewn ffurf wahanol iawn i steiliau addurniadol <a href="/wiki/Cyfnod_Fictoraidd" class="mw-redirect" title="Cyfnod Fictoraidd">oes Fictoria</a>. Roedd datblygiadau mewn defnyddiau adeiladu a thechnoleg yn golygu bod ffurfiau newydd o bensaerniaeth fwy syth ac onglog yn bosibl.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Mathemateg">Mathemateg</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=6" title="Golygu'r adran: Mathemateg" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=6" title="Edit section's source code: Mathemateg"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Datblygwyd meysydd newydd o fathemateg yn yr 20g.  Yn ystod hanner cyntaf yr 20g lluniwyd <i>theori mesur</i>, dadansoddiad swyddogaethol (Saesneg:<i>functional analysis</i>), a <a href="/wiki/Topoleg" title="Topoleg">thopoleg</a> (Saesneg:<i>topology</i>).  Bu datblygiadau pwysig hefyd mewn meysydd fel <a href="/wiki/Algebra_haniaethol" title="Algebra haniaethol">algebra haniaethol</a>, a syniadau <a href="/wiki/Tebygolrwydd" title="Tebygolrwydd">tebygolrwydd</a> (Saesneg:<i>probability</i>). </p><p>Yn nes ymlaen yn y ganrif, fe wnaeth datblygiad cyfrifiaduron arwain at greu theori gyfrifiadurol. Dyma’r ganrif pan wnaeth <a href="/wiki/Alan_Turing" title="Alan Turing">Alan Turing</a> ddod i’r amlwg fel un o benseiri gwyddoniaeth gyfrifiadurol. </p> <div class="mw-heading mw-heading2"><h2 id="Chwaraeon">Chwaraeon</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=7" title="Golygu'r adran: Chwaraeon" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=7" title="Edit section's source code: Chwaraeon"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Yn yr ugeinfed ganrif, daeth chwaraeon yn weithgaredd hamdden boblogaidd a hefyd yn fath o adloniant, yn enwedig ar y teledu. Cynhaliwyd y <a href="/wiki/Gemau_Olympaidd_Modern" title="Gemau Olympaidd Modern">Gemau Olympaidd</a> modern cyntaf yn 1896 a daeth yn un o ddigwyddiadau chwaraeon pwysicaf yr oes fodern. Cynhaliwyd <a href="/wiki/Cwpan_y_Byd_P%C3%AAl-droed" title="Cwpan y Byd Pêl-droed">Cwpan y Byd FIFA</a> am y tro cyntaf yn 1930, ac fe'i cynhaliwyd bob 4 mlynedd ar ôl yr Ail Ryfel Byd.  Dyma’r ganrif a welodd ddechrau <a href="/wiki/Cwpan_Rygbi%27r_Byd" title="Cwpan Rygbi'r Byd">Cwpan Rygbi'r Byd</a> a llu eraill o dwrneimantau chwaraeon byd-eang yn cael eu darlledu.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Ffiseg">Ffiseg</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=8" title="Golygu'r adran: Ffiseg" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=8" title="Edit section's source code: Ffiseg"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Yn ystod hanner cyntaf y ganrif datblygwyd meysydd newydd o <a href="/wiki/Ffiseg" title="Ffiseg">ffiseg</a>, fel perthynoledd arbennig, perthynoledd cyffredinol a <a href="/wiki/Mecaneg_cwantwm" title="Mecaneg cwantwm">mecaneg cwantwm</a>. Drwy astudio’r meysydd hyn ym maes ffiseg cafwyd gwell dealltwriaeth o strwythur yr <a href="/wiki/Atom" title="Atom">atom</a>.  Roedd y ffisegwr <a href="/wiki/Albert_Einstein" title="Albert Einstein">Albert Einstein</a> yn hollbwysig yn profi ei bod hi’n bosibl rhannu atom. </p><p>Darganfuwyd adweithiau niwclear, ac yn arbennig <a href="/wiki/Ymasiad_niwclear" title="Ymasiad niwclear">ymasiad niwclear</a>.  Roedd y ddeubeth hyn yn allweddol i ddeall gwreiddiau egni'r haul. </p><p>Darganfuwyd <a href="/wiki/Dyddio_radiocarbon" title="Dyddio radiocarbon">dyddio radiocarbon</a>, a ddaeth yn dechneg bwerus a chywir wrth benderfynu oedran anifeiliaid a phlanhigion cynhanesyddol, ac arteffactau ac eitemau hanesyddol. </p> <div class="mw-heading mw-heading2"><h2 id="Seryddiaeth">Seryddiaeth</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=9" title="Golygu'r adran: Seryddiaeth" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=9" title="Edit section's source code: Seryddiaeth"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure typeof="mw:File/Thumb"><a href="/wiki/Delwedd:Solar_sys.jpg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Solar_sys.jpg/220px-Solar_sys.jpg" decoding="async" width="220" height="138" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Solar_sys.jpg/330px-Solar_sys.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Solar_sys.jpg/440px-Solar_sys.jpg 2x" data-file-width="1440" data-file-height="904" /></a><figcaption>Cysawd yr Haul</figcaption></figure> <p>Datblygwyd dealltwriaeth well o sut oedd y <a href="/wiki/Bydysawd_(seryddiaeth)" title="Bydysawd (seryddiaeth)">bydysawd</a> wedi datblygu a beth oedd ei oedran. Amcangyfrifwyd ei fod tua 13.8 biliwn o flynyddoedd. Cyflwynwyd <a href="/wiki/Damcaniaeth_y_Glec_Fawr" title="Damcaniaeth y Glec Fawr">Damcaniaeth y Glec</a> <a href="/wiki/Damcaniaeth_y_Glec_Fawr" title="Damcaniaeth y Glec Fawr">Fawr</a> a oedd yn cynnig syniadau ynghylch sut oedd y byd wedi dod i fodolaeth. Cafodd y syniad hwn ei dderbyn yn gyffredinol.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p><p>Daeth seryddwyr i gasgliadau mwy pendant ynghylch oedran <a href="/wiki/Cysawd_yr_Haul" title="Cysawd yr Haul">Cysawd yr Haul</a>, gan gynnwys y Ddaear. Roedd y ddaear yn llawer hynach na'r hyn a gredwyd ynghynt – mae ei hoedran tua 4 biliwn o flynyddoedd yn hytrach na’r 20 miliwn o flynyddoedd a grybwyllwyd gan seryddwyr blaenorol. </p><p>Dechreuwyd arsylwi planedau Cysawd yr Haul a’r <a href="/wiki/Lleuad" title="Lleuad">lleuadau</a> yn llawer mwy manwl drwy ddefnyddio chwiliedyddion gofod.  Darganfuwyd y blaned <a href="/wiki/Plwton_(planed_gorrach)" title="Plwton (planed gorrach)">Plwton</a> yn 1930 ar gyrion Cysawd yr Haul, ond cafodd ei hail-gategoreiddio ar ddechrau'r 21ain ganrif fel ‘<i>plutoid</i>’ yn hytrach na phlaned go iawn. Golyga hyn mai dim ond 8 planed sydd yng Nghysawd yr Haul. </p> <div class="mw-heading mw-heading2"><h2 id="Bioleg">Bioleg</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=10" title="Golygu'r adran: Bioleg" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=10" title="Edit section's source code: Bioleg"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Gwnaed cynnydd pwysig ym maes <a href="/wiki/Geneteg" title="Geneteg">geneteg</a> a phwysigrwydd gwyddonol y maes hwnnw. Yn 1953 cyhoeddodd James Watson, Francis Crick, Rosalind Franklin a <a href="/wiki/Maurice_Wilkins" title="Maurice Wilkins">Maurice Wilkins</a> eu darganfyddiad bod gan <a href="/wiki/DNA" title="DNA">DNA</a> strwythur pendant. Bu hyn o gymorth mawr wrth ddatblygu technegau a fyddai’n medru darllen dilyniant DNA (DNA sequences) ac a arweiniodd at Brosiect Genom Dynol (Saesneg:<i>Human Genome Project</i>) fel y bu modd clonio mamal am y tro cyntaf yn 1996. </p> <div class="mw-heading mw-heading2"><h2 id="Meddygaeth">Meddygaeth</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=11" title="Golygu'r adran: Meddygaeth" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=11" title="Edit section's source code: Meddygaeth"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure typeof="mw:File/Thumb"><a href="/wiki/Delwedd:Smallpox.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/Smallpox.jpg/220px-Smallpox.jpg" decoding="async" width="220" height="145" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/Smallpox.jpg/330px-Smallpox.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/70/Smallpox.jpg/440px-Smallpox.jpg 2x" data-file-width="2920" data-file-height="1920" /></a><figcaption>Plentyn yn dioddef o'r frech wen</figcaption></figure> <p>Darganfuwyd <a href="/wiki/Penisilin" title="Penisilin">penisilin</a> gan <a href="/wiki/Alexander_Fleming" title="Alexander Fleming">Alexander Fleming</a> yn 1928. Roedd darganfyddiad <a href="/wiki/Gwrthfiotig" title="Gwrthfiotig">Gwrthfiotig</a> tebyg i hyn yn gweddnewid y byd meddygaeth modern. Byddai Gwrthfiotig yn arf pwysig wrth leihau marwolaethau oherwydd afiechydon bacteriol. </p><p>Datblygwyd brechiad ar gyfer <a href="/wiki/Poliomyelitis" title="Poliomyelitis">Poliomyelitis</a>. Datblygwyd brechiadau effeithiol ar gyfer nifer o afiechydon heintus eraill, gan gynnwys <a href="/wiki/Y_ffliw" title="Y ffliw">y ffliw</a>, <a href="/wiki/Melyn_mannog" title="Melyn mannog">Melyn mannog</a>, <a href="/wiki/Y_P%C3%A2s" class="mw-redirect" title="Y Pâs">y pâs</a>, <a href="/wiki/Tetanws" title="Tetanws">tetanws</a>, <a href="/wiki/Brech_goch" title="Brech goch">y frech goch</a>, <a href="/wiki/Clwy%27r_pennau" title="Clwy'r pennau">clwy’r pennau</a> (mumps), <a href="/wiki/Brech_ieir" title="Brech ieir">brech ieir</a>, <a href="/wiki/Hepatitis_A" title="Hepatitis A">hepatitis A</a> a <a href="/wiki/Hepatitis_B" title="Hepatitis B">hepatitis B</a>.  Arweiniodd mwy o ymchwil ym maes brechiadau at ddileu feirws <a href="/wiki/Brech_wen" title="Brech wen">y frech wen</a> yn gyfan gwbl mewn pobl.  Mae brechiadau, gwell safonau glendid a chyflenwadau dŵr glân wedi lleihau achosion marwolaethau, yn enwedig ymhlith babanod a phlant. </p><p>Sefydlwyd y clinig atal cenhedlu cyntaf ym Mhrydain gan <a href="/wiki/Marie_Stopes" title="Marie Stopes">Marie Stopes</a> yn 1920.  Bu datblygiadau ym maes dulliau atal cenhedlu yn hollbwysig o ran lleihau twf ym mhoblogaeth gwledydd diwydiannol y byd. </p> <figure class="mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/Delwedd:Knee_plain_X-ray.jpg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Knee_plain_X-ray.jpg/180px-Knee_plain_X-ray.jpg" decoding="async" width="180" height="241" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Knee_plain_X-ray.jpg/270px-Knee_plain_X-ray.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Knee_plain_X-ray.jpg/359px-Knee_plain_X-ray.jpg 2x" data-file-width="1936" data-file-height="2595" /></a><figcaption>pelydr-x o ben-glin dynol</figcaption></figure> <p>Bu darganfyddiad <a href="/wiki/Inswlin_(meddyginiaeth)" title="Inswlin (meddyginiaeth)">inswlin</a> meddygol yn ystod y 1920au yn bwysig o ran gwella disgwyliadau oedran cleifion diabetig gymaint â thair gwaith. </p><p>Daeth <a href="/wiki/Pelydr-X" title="Pelydr-X">pelydr-X</a> yn rhan bwysig o wneud diagnosis wrth drin cleifion – o dorri <a href="/wiki/Asgwrn" title="Asgwrn">asgwrn</a> i <a href="/wiki/Canser" title="Canser">ganser</a>. O’r 1960au ymlaen datblygwyd offer diagnostig eraill, er enghraifft, sonograffi, ac o’r 1970au ymlaen defnyddiwyd <a href="/wiki/Delweddu_cyseiniant_magnetig" title="Delweddu cyseiniant magnetig">MRI</a> (magnetic resonance imaging). </p><p>Yn ystod y 1950au profodd ymchwil bod cysylltiad uniongyrchol rhwng ysmygu <a href="/wiki/Tybaco" title="Tybaco">tybaco</a> a chanser. Datblygwyd dulliau newydd o drin canser, er enghraifft, <a href="/wiki/Cemotherapi" title="Cemotherapi">cemotherapi</a>, therapi ymbelydrol ac imiwnotherapi. O ganlyniad roedd modd gwella’n llwyr o ganser neu wella am ysbaid. </p><p>Dechreuwyd categoreiddio gwaed a sefydlwyd banciau gwaed. Golygai hyn bod trawsarllwysiad gwaed yn fwy diogel ac yn dod yn fwy cyffredin. Cynhaliwyd y trawsblaniad calon cyntaf lle llwyddwyd i ddod â'r claf yn ôl yn ymwybodol yn 1967 gan Dr Christiaan Barnard. Bu dyfeisiadau a datblygiadau mewn meddyginiaethau gwrthimiwnaidd a sut roedd meinwe yn cael ei gategoreiddio, a golygodd hynny bod trawsblaniadau organau a meinwe yn dod yn fwy cyffredin. Datblygwyd triniaethau newydd ar gyfer llawdriniaethau ar y <a href="/wiki/Calon" title="Calon">galon</a> – er enghraifft, datblygu amseriaduron calon a chalonnau artiffisial. </p> <div class="mw-heading mw-heading2"><h2 id="Afiechydon">Afiechydon</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=12" title="Golygu'r adran: Afiechydon" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=12" title="Edit section's source code: Afiechydon"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Lladdwyd rhwng 20 a 100 miliwn o bobl rhwng 1918 a 1919 gan bandemig ffliw y <a href="/wiki/Pandemig_ffliw_1918" title="Pandemig ffliw 1918">Ffliw Sbaenaidd</a>. </p><p>Darganfuwyd feirws newydd, sef <a href="/wiki/HIV" title="HIV">HIV</a>, a gychwynnodd yn <a href="/wiki/Affrica" title="Affrica">Affrica</a>.  Roedd y feirws HIV yn arwain at gyflwr <a href="/wiki/AIDS" title="AIDS">AIDS</a> a lledaenodd y feirws ar draws y byd, gan ladd miliynau o bobl. Datblygwyd brechiadau a meddyginaethau i drin y cyflwr. </p><p>Gan fod cyfraddau oedran wedi cynyddu mae afiechydon fel canser, <a href="/wiki/Clefyd_Alzheimer" title="Clefyd Alzheimer">Clefyd Alzheimer</a> a Chlefyd Parkinson wedi dod yn fwy cyffredin. </p> <div class="mw-heading mw-heading2"><h2 id="Egni_a'r_amgylchedd"><span id="Egni_a.27r_amgylchedd"></span>Egni a'r amgylchedd</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=13" title="Golygu'r adran: Egni a'r amgylchedd" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=13" title="Edit section's source code: Egni a'r amgylchedd"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Delwedd:Hoogovens.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Hoogovens.JPG/220px-Hoogovens.JPG" decoding="async" width="220" height="160" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Hoogovens.JPG/330px-Hoogovens.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Hoogovens.JPG/440px-Hoogovens.JPG 2x" data-file-width="1024" data-file-height="744" /></a><figcaption>Gwaith dur yn yr Iseldiroedd</figcaption></figure> <p>Yn ystod yr 20g defnyddiwyd mwy o adnoddau ffosil fel glo, <a href="/wiki/Olew" title="Olew">olew</a> a <a href="/wiki/Petroliwm" title="Petroliwm">phetrol</a>. Gwnaed mwy o ddefnydd o <a href="/wiki/Ynni_niwclear" title="Ynni niwclear">bŵer niwclear</a> hefyd. </p><p>Achosodd y defnydd cynyddol o danwydd ffosil drafodaeth fyd-eang am ei effaith ar lygredd awyr, cynhesu byd-eang a’r newid oedd yn digwydd yn nhymheredd yr hinsawdd. </p><p>Roedd plaladdwyr, chwynladdwyr a chemegau gwenwynig eraill yn crynhoi yn yr amgylchedd, yng nghyrff pobl ac mewn anifeiliaid. </p> <div class="mw-heading mw-heading2"><h2 id="Peirianneg_a_thechnoleg">Peirianneg a thechnoleg</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=14" title="Golygu'r adran: Peirianneg a thechnoleg" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=14" title="Edit section's source code: Peirianneg a thechnoleg"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Un o nodweddion pennaf yr 20g oedd twf a dylanwad technoleg. Cafodd yr ymchwil a wnaed ym maes technoleg effaith ar feysydd eraill fel <a href="/wiki/Cyfathrebu" title="Cyfathrebu">cyfathrebu</a>, <a href="/wiki/Electroneg" title="Electroneg">electroneg</a>, <a href="/wiki/Peirianneg" title="Peirianneg">peirianneg</a>, <a href="/wiki/Teithio" title="Teithio">teithio</a>, <a href="/wiki/Meddygaeth" title="Meddygaeth">meddygaeth</a> a <a href="/wiki/Rhyfel" title="Rhyfel">rhyfel</a>. Dechreuwyd defnyddio offer sylfaenol technolegol yn y cartref o’r 1920au ymlaen, gan ennill mwy o boblogrwydd o’r 1950au ymlaen: er enghraifft, <a href="/wiki/Peiriant_golchi" title="Peiriant golchi">peiriant golchi</a>, sychwyr dillad, rhewgelloedd, rhewgistiau, ffyrnau trydan a sugnwyr llwch.  Poblogeiddiwyd y <a href="/wiki/Radio" title="Radio">radio</a> fel ffurf o adloniant o’r 1920au ymlaen. Defnyddiwyd y radio hefyd ar adegau o argyfwng cenedlaethol i gyfathrebu gyda chynulleidfa eang. Daeth <a href="/wiki/Franklin_D._Roosevelt" title="Franklin D. Roosevelt">F. D. Roosevelt</a>, Arlywydd America, yn enwog yn ystod ei gyfnod fel Arlywydd am ei ‘sgyrsiau ger y tân’ ar y radio gyda phobl America. Roedd <a href="/wiki/Winston_Churchill" title="Winston Churchill">Winston Churchill</a> hefyd yn defnyddio’r radio fel arf propaganda wrth iddo geisio codi morâl pobl Prydain adeg yr Ail Ryfel Byd. Daeth y teledu yn fwyfwy cyffredin yn ystod y 1950au a’r 1960au hefyd. </p><p>Hedfanwyd yr <a href="/wiki/Awyren" title="Awyren">awyren</a> gyntaf yn 1903.  Dyfeisiwyd yr injan jet gyflymach yn ystod y 1940au ac oherwydd hynny daeth teithio drwy'r awyr o fewn cyrraedd i filiynau o bobl. Daeth cwmnïau teithio masnachol oedd yn darparu gwyliau drwy deithio drwy'r awyr yn fwy cyffredin. </p><p>Roedd datblygiad y ‘<i>llinell gynhyrchu</i>’ yn caniatáu adeiladu ceir ar raddfa gyflymach. Ar ddechrau’r 20g cwmni ceir <a href="/wiki/Henry_Ford" title="Henry Ford">Henry Ford</a> yn America oedd yr un cyntaf yn y byd a fedrai gynhyrchu car ar raddfa eang oherwydd y defnydd o’r llinell gynhyrchu. Ceir Ford oedd y rhain. </p><p>Dyfeisiwyd a defnyddiwyd defnyddiau newydd fel dur gloyw, <a href="/wiki/Caewr_bachyn-a-dolen" title="Caewr bachyn-a-dolen">felcro</a>, <a href="/wiki/Silicon" title="Silicon">silicon</a>, tefflon. Daeth plastigau fel polystyren, PVC, polyethylen a <a href="/wiki/Neilon" title="Neilon">neilon</a> yn fwy cyffredin a dechreuwyd eu defnyddio ar gyfer sawl pwrpas gwahanol. Roedd y defnyddiau newydd hyn yn cynnig cryfder, yn medru goddef tymheredd uchel, ac yn medru gwrthsefyll gwahanol gemegau roedd llawer o ddefnyddiau cyn yr 20g yn methu eu gwrthsefyll. Daeth alwminiwm yn fwyfwy cyffredin ac yn ail o ran defnydd i <a href="/wiki/Haearn" title="Haearn">haearn</a>. Datblygwyd miloedd o gemegau ar gyfer cael eu prosesu mewn diwydiant neu ar gyfer defnydd yn y cartref. </p> <div class="mw-heading mw-heading2"><h2 id="Y_Chwyldro_Digidol">Y Chwyldro Digidol</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=15" title="Golygu'r adran: Y Chwyldro Digidol" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=15" title="Edit section's source code: Y Chwyldro Digidol"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure typeof="mw:File/Thumb"><a href="/wiki/Delwedd:SPARCstation_1.jpg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/3/32/SPARCstation_1.jpg/180px-SPARCstation_1.jpg" decoding="async" width="180" height="199" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/32/SPARCstation_1.jpg/270px-SPARCstation_1.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/32/SPARCstation_1.jpg/359px-SPARCstation_1.jpg 2x" data-file-width="448" data-file-height="496" /></a><figcaption>Cyfrifiadur personol 'SPARCstation' o'r 90au cynnar</figcaption></figure> <p>Ar ddiwedd yr 20g bu chwyldro digidol a oedd hefyd yn cael ei adnabod, ymhlith enwau eraill, fel yr ‘oes wybodaeth’ neu'r ‘chwyldro gwybodaeth’. </p><p>Dyfeisiwyd y <a href="/wiki/Cylched_gyfannol" title="Cylched gyfannol">microsglodyn</a> ar ddechrau’r 1960au. Datblygwyd y microsglodyn ymhellach yn y 1970au ac erbyn dechrau'r 1980au roedd y chwyldro microsglodion wedi dechrau. Arweiniodd hyn at y <a href="/wiki/Cyfrifiadur_personol" title="Cyfrifiadur personol">cyfrifiaduron personol</a> yn y 1980au, yna at ddyfeisio ffonau symudol a’r rhyngrwyd byd-eang yn ystod y 1990au. </p><p>Erbyn y 1980au a’r 1990au roedd teledu lloeren yn dod yn fwy poblogaidd ac roedd cyfrifiaduron wedi dechrau cael eu defnyddio yn nhai pobl yn ystod y 1970au a’r 1980au. Daeth camerâu digidol yn fwy cyffredin yn ystod y 1980au a’r 1990au. </p><p>Bu radio transistor, traciau 8 sain a thapiau casét yn ystod y 1960au yn gamau pwysig yn natblygiad chwaraewyr cerddoriaeth symudol.  Yn raddol disodlodd y rhain chwaraewyr recordiau, gyda’r <a href="/wiki/Walkman" title="Walkman">Sony Walkman</a> yn cael ei gyflwyno yn y 1970au. Wedyn daeth <a href="/wiki/Crynoddisg" title="Crynoddisg">Cryno-ddisgiau</a> yn ystod y 1980au a’r 1990au.  Fe wnaeth dyfodiad yr MP3 ar y we yn ystod canol a ddiwedd y 1990au y broses o ddosbarthu cerddoriaeth yn ddigidol yn bosib. Roedd chwaraewyr tapiau fideo (VCRs) yn boblogaidd yn ystod y 1970au ond erbyn diwedd yr 20g roeddent wedi dechrau cael eu disodli gan chwaraewyr <a href="/wiki/DVD" title="DVD">DVD</a>.  Erbyn diwedd degawd cyntaf yr 21ain ganrif roedd VHS wedi dod i ben fel cyfrwng hyfyw. </p><p>Bu twf enfawr hefyd yn y diwydiant telegyfathrebu tuag at ddiwedd yr 20g, gyda chyfathrebu di-wifr yn dod yn gyffredin. Gwelwyd twf mewn rhwydweithiau a chwmnïau ffonau symudol yn sgil hynny. </p> <div class="mw-heading mw-heading2"><h2 id="Fforio_yn_y_gofod">Fforio yn y gofod</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=16" title="Golygu'r adran: Fforio yn y gofod" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=16" title="Edit section's source code: Fforio yn y gofod"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure typeof="mw:File/Thumb"><a href="/wiki/Delwedd:Yuri_Gagarin_(1961)_-_Restoration.jpg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e5/Yuri_Gagarin_%281961%29_-_Restoration.jpg/180px-Yuri_Gagarin_%281961%29_-_Restoration.jpg" decoding="async" width="180" height="225" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e5/Yuri_Gagarin_%281961%29_-_Restoration.jpg/270px-Yuri_Gagarin_%281961%29_-_Restoration.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e5/Yuri_Gagarin_%281961%29_-_Restoration.jpg/360px-Yuri_Gagarin_%281961%29_-_Restoration.jpg 2x" data-file-width="2213" data-file-height="2767" /></a><figcaption><a href="/wiki/Yuri_Gagarin" title="Yuri Gagarin">Yuri Gagarin</a>. Y person cyntaf i fynd i'r gofod.</figcaption></figure> <p>Ar ôl yr Ail Ryfel Byd datblygodd <a href="/wiki/Ras_arfau" title="Ras arfau">Ras Arfau</a> a <a href="/wiki/Y_Ras_Ofod" title="Y Ras Ofod">Ras i’r Gofod</a> rhwng yr arch-bwerau, sef <a href="/wiki/Unol_Daleithiau_America" title="Unol Daleithiau America">Unol Daleithiau America</a> a’r <a href="/wiki/Yr_Undeb_Sofietaidd" title="Yr Undeb Sofietaidd">Undeb Sofietaidd</a>.  Roedd hyn yn rhan o’r <a href="/wiki/Y_Rhyfel_Oer" title="Y Rhyfel Oer">Rhyfel Oer</a>. </p><p><b>Teithiau dyn i’r gofod</b> </p><p><b>1961</b> – Yr Undeb Sofietaidd yn lansio taith ofod <a href="/wiki/Vostok" title="Vostok">Vostok 1</a>, sef taith gyntaf erioed dyn i’r gofod. </p><p><b>1969</b> – Yr Unol Daleithiau yn lansio <a href="/wiki/Apollo_11" title="Apollo 11">Apollo 11</a>, gyda dyn yn glanio ar y lleuad am y tro cyntaf. </p><p> Yn nes ymlaen lansiodd rhaglen ofod yr Undeb Sofietaidd yr orsaf ofod gyntaf.</p><figure class="mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/Delwedd:Tarantula_Nebula_-_Hubble.jpg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/d/da/Tarantula_Nebula_-_Hubble.jpg/150px-Tarantula_Nebula_-_Hubble.jpg" decoding="async" width="150" height="122" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/da/Tarantula_Nebula_-_Hubble.jpg/225px-Tarantula_Nebula_-_Hubble.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/da/Tarantula_Nebula_-_Hubble.jpg/300px-Tarantula_Nebula_-_Hubble.jpg 2x" data-file-width="3204" data-file-height="2602" /></a><figcaption>Llun o nifwl Tarantula gan delesgop Hubble.</figcaption></figure> <p><b>1981</b> – yr Unol Daleithiau yn datblygu’r system ofod adnewyddadwy gyntaf. Hon oedd Rhaglen y <i>Space Shuttle</i>. </p><p>Roedd lloerenni Di-griw hefyd yn hanfodol ar gyfer parhau i fforio a darganfod pethau am y gofod. Lansiwyd lloeren Sputnik 1 yn 1957 gan yr Undeb Sofietaidd, sef y lloeren gyntaf erioed i gael ei lansio i’r gofod. Roedd y lloeren hon yn teithio'n gyson i wahanol fannau yn y gofod. Lansiwyd nifer o loerenni yn ddiweddarach oedd yn teithio o gwmpas y ddaear.  Erbyn diwedd yr 20g roedd nifer o loerenni wedi ymweld â’r lleuad, planedau Mercher, Fenws, Mawrth, Iau, Sadwrn, Wranws a Neifion yn ogystal ag asteroidau a chomedau eraill. Lansiwyd <a href="/wiki/Telesgop_Gofod_Hubble" title="Telesgop Gofod Hubble">Telesgop Gofod Hubble</a> yn 1990 a oedd yn galluogi darlledu lluniau o’r bydysawd ar gyfrifiaduron a theledu ar draws y byd. Roedd hyn yn ddatblygiad pellach o ran faint o wybodaeth oedd yn medru cael ei chasglu am y bydysawd a dealltwriaeth dyn o’r bydysawd. </p> <div class="mw-heading mw-heading2"><h2 id="Yr_20fed_ganrif_yng_Nghymru">Yr 20fed ganrif yng Nghymru</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=17" title="Golygu'r adran: Yr 20fed ganrif yng Nghymru" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=17" title="Edit section's source code: Yr 20fed ganrif yng Nghymru"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <div style="margin-bottom:0.01em; padding: 0.01px; text-align: left; font-size: 100%;"> <dl><dd><span class="boilerplate seealso"><i>Prif: <a href="/wiki/20fed_ganrif_yng_Nghymru" class="mw-redirect" title="20fed ganrif yng Nghymru">20fed ganrif yng Nghymru</a></i></span></dd></dl></div> <p>Daeth dechrau canrif newydd â chyfnod cyffrous o dwf economaidd a newidiadau gwleidyddol pellgyrhaeddol yng <a href="/wiki/Cymru" title="Cymru">Nghymru</a>. Dyma ganrif hefyd a welodd Cymru yn magu mwy o ymwybyddiaeth o’i hunaniaeth fel gwlad ac o ran ei hiaith a’i diwylliant.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p><p>Ar ddechrau’r ganrif roedd cymoedd y de a’r diwydiant glo yn ffynnu ac yn cynhyrchu traean o holl allforion glo'r byd. Ar y llaw arall, roedd 1900-1913 yn gyfnod o anghydfod diwydiannol gyda streic <a href="/wiki/Chwarel_y_Penrhyn" title="Chwarel y Penrhyn">Chwarel y Penrhyn</a>, a therfysgoedd <a href="/wiki/Tonypandy" title="Tonypandy">Tonypandy</a> a <a href="/wiki/Llanelli" title="Llanelli">Llanelli</a> yn ddiweddarach. Mewn materion gwleidyddol clywid llais y merched am y tro cyntaf gyda chychwyn ymgyrch y <a href="/wiki/Swffrag%C3%A9t" title="Swffragét">Swffragetiaid</a>.  Roedd yn gyfnod o lwyddiant ac optimistaeth mawr, ond buan y tarfwyd ar hynny gyda dechrau'r Rhyfel Byd Cyntaf yn 1914. Yn ei sgil daeth un o brif ffigurau gwleidyddol amlycaf Cymru’r 20g i’r amlwg, sef <a href="/wiki/David_Lloyd_George" title="David Lloyd George">David Lloyd George</a>.  Amlygodd y Cymro ei hun fel arweinydd medrus ac adnabuwyd ef fel ‘y dyn a enillodd y rhyfel’. </p><p>Ond er mor deyrngar oedd Cymru i’r Rhyddfrydwyr ar ddechrau’r ganrif gwelwyd newidiadau mawr ym map gwleidyddol Cymru yn ystod yr ugeinfed ganrif. Erbyn y 1920au a’r 1930au roedd de Cymru wedi dod yn gadarnle i’r Blaid Lafur, gyda hyd yn oed rywfaint o gefnogaeth i’r Blaid Gomiwnyddol. Er enghraifft, roedd y Rhondda yn cael ei hadnabod fel ‘Moscow Fach’ yn ystod y cyfnod hwn. Sefydlwyd <a href="/wiki/Plaid_Genedlaethol_Cymru" title="Plaid Genedlaethol Cymru">Plaid Genedlaethol Cymru</a> yn 1925, ac yn ystod y degawdau dilynol enillodd y blaid dir newydd yng Nghymru. </p><p>Ym myd gwaith symudodd Cymru o fod yn wlad a oedd yn ddibynnol ar y diwydiannau trwm traddodiadol i fod yn wlad ag economi fwy amrywiol, gyda symudiad tuag at waith cynhyrchu ceir, swyddi gweinyddol a byd <a href="/wiki/Twristiaeth_yng_Nghymru" title="Twristiaeth yng Nghymru">twristiaeth</a>. Roedd hon yn ganrif lle gwelwyd y gwerthoedd traddodiadol crefyddol yn crebachu, ac roedd yr hen Gymru Anghydffurfiol, a fu’n ddylanwad mor hollbwerus ym mywyd Cymru ar ddechrau’r ganrif, wedi colli ei hapêl i genedlaethau newydd erbyn diwedd y ganrif. </p><p>Magodd Cymru hyder cynyddol yn ei hunaniaeth yn ystod y ganrif, gyda sefydliadau cenedlaethol yn cael eu sefydlu fel <a href="/wiki/Prifysgol_Cymru" title="Prifysgol Cymru">Prifysgol Cymru</a>, y <a href="/wiki/Llyfrgell_Genedlaethol_Cymru" title="Llyfrgell Genedlaethol Cymru">Llyfrgell Genedlaethol</a> a’r <a href="/wiki/Amgueddfa_Cymru" title="Amgueddfa Cymru">Amgueddfa</a>. Meithrinwyd hefyd ymwybyddiaeth a balchder cynyddol yn ei hiaith a’i diwylliant, gyda thwf mewn addysg <a href="/wiki/Cymraeg" title="Cymraeg">Gymraeg</a>, deddfau iaith yn cael eu pasio a hefyd mudiadau yn cael eu sefydlu er mwyn amddiffyn a hyrwyddo hawliau’r iaith. Cryfhawyd yr ymdeimlad hwn o genedlaetholdeb yn sgil profiadau Cymru yn ystod y ganrif - er enghraifft, y cronfeydd dŵr a agorwyd ar draul dinistrio cymunedau Cymraeg eu hiaith, <a href="/wiki/Capel_Celyn" title="Capel Celyn">Boddi Tryweryn</a> a’r defnydd a wnaed o’i thir ar gyfer pwrpas milwrol. Roedd y 1960au yn gyfnod lle gwelwyd newid mewn agweddau tuag at werthoedd traddodiadol y genhedlaeth hŷn. Roedd y genhedlaeth ifanc yn herio’r hen drefn. Dyma’r cyfnod pan ddatblygodd ‘Y bwlch rhwng cenedlaethau’. Adlewyrchwyd y newid hwn mewn cerddoriaeth boblogaidd Cymraeg. Ysbrydolwyd nhw gan gynnwrf protestiadau gwleidyddol y cyfnod - er enghraifft, <a href="/wiki/Dafydd_Iwan" title="Dafydd Iwan">Dafydd Iwan</a> yn cyfansoddi caneuon adeg Arwisgiad 1969. Wedi i’r <a href="/wiki/Plaid_Lafur" class="mw-disambig" title="Plaid Lafur">Blaid Lafur</a> ennill etholiad 1974, ailgydiwyd yn y drafodaeth ynghylch ymreolaeth i Gymru, ac roedd sefydlu mudiadau fel mudiad ysgolion meithrin yn dyst i’r ffaith nad iaith i’r henoed yn unig oedd y Gymraeg. </p><p>Coronwyd diwedd y ganrif gyda sefydliad gwleidyddol newydd i Gymru.<b> </b>Etholwyd llywodraeth newydd i Brydain, ac mewn <a href="/wiki/Refferendwm_datganoli_i_Gymru,_1997" title="Refferendwm datganoli i Gymru, 1997">refferendwm</a> yn 1997 pleidleisiodd pobl Cymru dros ddatganoli. Trawsnewidiwyd <a href="/wiki/Bae_Caerdydd" title="Bae Caerdydd">Bae Caerdydd</a> gydag adeiladau trawiadol y <a href="/wiki/Y_Senedd_(adeilad_y_Cynulliad)" class="mw-redirect" title="Y Senedd (adeilad y Cynulliad)">Senedd</a> a <a href="/wiki/Canolfan_Mileniwm_Cymru" title="Canolfan Mileniwm Cymru">Chanolfan y Mileniwm</a>.<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Blynyddoedd_a_degawdau">Blynyddoedd a degawdau</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=18" title="Golygu'r adran: Blynyddoedd a degawdau" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=18" title="Edit section's source code: Blynyddoedd a degawdau"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <table border="0" cellpadding="5" style="background: #eef8ff"> <tbody><tr> <td><b><a href="/wiki/1900au" title="1900au">1900au</a></b>         <a href="/wiki/1901" title="1901">1901</a> <a href="/wiki/1902" title="1902">1902</a> <a href="/wiki/1903" title="1903">1903</a> <a href="/wiki/1904" title="1904">1904</a> <a href="/wiki/1905" title="1905">1905</a> <a href="/wiki/1906" title="1906">1906</a> <a href="/wiki/1907" title="1907">1907</a> <a href="/wiki/1908" title="1908">1908</a> <a href="/wiki/1909" title="1909">1909</a> </td></tr> <tr style="background: #ddeeff"> <td><b><a href="/wiki/1910au" title="1910au">1910au</a></b> <a href="/wiki/1910" title="1910">1910</a> <a href="/wiki/1911" title="1911">1911</a> <a href="/wiki/1912" title="1912">1912</a> <a href="/wiki/1913" title="1913">1913</a> <a href="/wiki/1914" title="1914">1914</a> <a href="/wiki/1915" title="1915">1915</a> <a href="/wiki/1916" title="1916">1916</a> <a href="/wiki/1917" title="1917">1917</a> <a href="/wiki/1918" title="1918">1918</a> <a href="/wiki/1919" title="1919">1919</a> </td></tr> <tr style="background: #eef8ff"> <td><b><a href="/wiki/1920au" title="1920au">1920au</a></b> <a href="/wiki/1920" title="1920">1920</a> <a href="/wiki/1921" title="1921">1921</a> <a href="/wiki/1922" title="1922">1922</a> <a href="/wiki/1923" title="1923">1923</a> <a href="/wiki/1924" title="1924">1924</a> <a href="/wiki/1925" title="1925">1925</a> <a href="/wiki/1926" title="1926">1926</a> <a href="/wiki/1927" title="1927">1927</a> <a href="/wiki/1928" title="1928">1928</a> <a href="/wiki/1929" title="1929">1929</a> </td></tr> <tr style="background: #ddeeff"> <td><b><a href="/wiki/1930au" title="1930au">1930au</a></b> <a href="/wiki/1930" title="1930">1930</a> <a href="/wiki/1931" title="1931">1931</a> <a href="/wiki/1932" title="1932">1932</a> <a href="/wiki/1933" title="1933">1933</a> <a href="/wiki/1934" title="1934">1934</a> <a href="/wiki/1935" title="1935">1935</a> <a href="/wiki/1936" title="1936">1936</a> <a href="/wiki/1937" title="1937">1937</a> <a href="/wiki/1938" title="1938">1938</a> <a href="/wiki/1939" title="1939">1939</a> </td></tr> <tr style="background: #eef8ff"> <td><b><a href="/wiki/1940au" title="1940au">1940au</a></b> <a href="/wiki/1940" title="1940">1940</a> <a href="/wiki/1941" title="1941">1941</a> <a href="/wiki/1942" title="1942">1942</a> <a href="/wiki/1943" title="1943">1943</a> <a href="/wiki/1944" title="1944">1944</a> <a href="/wiki/1945" title="1945">1945</a> <a href="/wiki/1946" title="1946">1946</a> <a href="/wiki/1947" title="1947">1947</a> <a href="/wiki/1948" title="1948">1948</a> <a href="/wiki/1949" title="1949">1949</a> </td></tr> <tr style="background: #ddeeff"> <td><b><a href="/wiki/1950au" title="1950au">1950au</a></b> <a href="/wiki/1950" title="1950">1950</a> <a href="/wiki/1951" title="1951">1951</a> <a href="/wiki/1952" title="1952">1952</a> <a href="/wiki/1953" title="1953">1953</a> <a href="/wiki/1954" title="1954">1954</a> <a href="/wiki/1955" title="1955">1955</a> <a href="/wiki/1956" title="1956">1956</a> <a href="/wiki/1957" title="1957">1957</a> <a href="/wiki/1958" title="1958">1958</a> <a href="/wiki/1959" title="1959">1959</a> </td></tr> <tr style="background: #eef8ff"> <td><b><a href="/wiki/1960au" title="1960au">1960au</a></b> <a href="/wiki/1960" title="1960">1960</a> <a href="/wiki/1961" title="1961">1961</a> <a href="/wiki/1962" title="1962">1962</a> <a href="/wiki/1963" title="1963">1963</a> <a href="/wiki/1964" title="1964">1964</a> <a href="/wiki/1965" title="1965">1965</a> <a href="/wiki/1966" title="1966">1966</a> <a href="/wiki/1967" title="1967">1967</a> <a href="/wiki/1968" title="1968">1968</a> <a href="/wiki/1969" title="1969">1969</a> </td></tr> <tr style="background: #ddeeff"> <td><b><a href="/wiki/1970au" title="1970au">1970au</a></b> <a href="/wiki/1970" title="1970">1970</a> <a href="/wiki/1971" title="1971">1971</a> <a href="/wiki/1972" title="1972">1972</a> <a href="/wiki/1973" title="1973">1973</a> <a href="/wiki/1974" title="1974">1974</a> <a href="/wiki/1975" title="1975">1975</a> <a href="/wiki/1976" title="1976">1976</a> <a href="/wiki/1977" title="1977">1977</a> <a href="/wiki/1978" title="1978">1978</a> <a href="/wiki/1979" title="1979">1979</a> </td></tr> <tr style="background: #eef8ff"> <td><b><a href="/wiki/1980au" title="1980au">1980au</a></b> <a href="/wiki/1980" title="1980">1980</a> <a href="/wiki/1981" title="1981">1981</a> <a href="/wiki/1982" title="1982">1982</a> <a href="/wiki/1983" title="1983">1983</a> <a href="/wiki/1984" title="1984">1984</a> <a href="/wiki/1985" title="1985">1985</a> <a href="/wiki/1986" title="1986">1986</a> <a href="/wiki/1987" title="1987">1987</a> <a href="/wiki/1988" title="1988">1988</a> <a href="/wiki/1989" title="1989">1989</a> </td></tr> <tr style="background: #ddeeff"> <td><b><a href="/wiki/1990au" title="1990au">1990au</a></b> <a href="/wiki/1990" title="1990">1990</a> <a href="/wiki/1991" title="1991">1991</a> <a href="/wiki/1992" title="1992">1992</a> <a href="/wiki/1993" title="1993">1993</a> <a href="/wiki/1994" title="1994">1994</a> <a href="/wiki/1995" title="1995">1995</a> <a href="/wiki/1996" title="1996">1996</a> <a href="/wiki/1997" title="1997">1997</a> <a href="/wiki/1998" title="1998">1998</a> <a href="/wiki/1999" title="1999">1999</a> </td></tr> <tr style="background: #eef8ff"> <td><b><a href="/wiki/2000au" title="2000au">2000au</a></b> <a href="/wiki/2000" title="2000">2000</a> </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="Gweler_hefyd">Gweler hefyd</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=19" title="Golygu'r adran: Gweler hefyd" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=19" title="Edit section's source code: Gweler hefyd"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Yr_Ugeinfed_Ganrif_yng_Nghymru" class="mw-redirect" title="Yr Ugeinfed Ganrif yng Nghymru">Yr Ugeinfed Ganrif yng Nghymru</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Cyfeiriadau">Cyfeiriadau</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=20" title="Golygu'r adran: Cyfeiriadau" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=20" title="Edit section's source code: Cyfeiriadau"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="https://www.britannica.com/event/Tiananmen-Square-incident">"Tiananmen Square incident | Chinese history [1989]"</a>. <i>Encyclopedia Britannica</i> (yn Saesneg)<span class="reference-accessdate">. Cyrchwyd <span class="nowrap">2020-03-30</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Encyclopedia+Britannica&rft.atitle=Tiananmen+Square+incident+%7C+Chinese+history+%5B1989%5D&rft_id=https%3A%2F%2Fwww.britannica.com%2Fevent%2FTiananmen-Square-incident&rfr_id=info%3Asid%2Fcy.wikipedia.org%3A20fed+ganrif" class="Z3988"></span><style data-mw-deduplicate="TemplateStyles:r8312344">.mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}</style></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a></span> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="https://www.britannica.com/topic/democracy">"Democracy - The spread of democracy in the 20th century"</a>. <i>Encyclopedia Britannica</i> (yn Saesneg)<span class="reference-accessdate">. Cyrchwyd <span class="nowrap">2020-03-30</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Encyclopedia+Britannica&rft.atitle=Democracy+-+The+spread+of+democracy+in+the+20th+century&rft_id=https%3A%2F%2Fwww.britannica.com%2Ftopic%2Fdemocracy&rfr_id=info%3Asid%2Fcy.wikipedia.org%3A20fed+ganrif" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><a href="#cite_ref-3">↑</a></span> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="http://resource.download.wjec.co.uk.s3.amazonaws.com/vtc/2016-17/16-17_2-15/cym/Datblygu-rhyfela.pdf">"Datblygiad Rhyfela"</a> <span class="cs1-format">(PDF)</span>. <i>CBAC</i><span class="reference-accessdate">. Cyrchwyd <span class="nowrap">3 Ebrill</span> 2020</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=CBAC&rft.atitle=Datblygiad+Rhyfela&rft_id=http%3A%2F%2Fresource.download.wjec.co.uk.s3.amazonaws.com%2Fvtc%2F2016-17%2F16-17_2-15%2Fcym%2FDatblygu-rhyfela.pdf&rfr_id=info%3Asid%2Fcy.wikipedia.org%3A20fed+ganrif" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">↑</a></span> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="https://www.britannica.com/art/rock-and-roll-early-style-of-rock-music">"rock and roll | History, Songs, Artists, & Facts"</a>. <i>Encyclopedia Britannica</i> (yn Saesneg)<span class="reference-accessdate">. Cyrchwyd <span class="nowrap">2020-03-30</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Encyclopedia+Britannica&rft.atitle=rock+and+roll+%7C+History%2C+Songs%2C+Artists%2C+%26+Facts&rft_id=https%3A%2F%2Fwww.britannica.com%2Fart%2Frock-and-roll-early-style-of-rock-music&rfr_id=info%3Asid%2Fcy.wikipedia.org%3A20fed+ganrif" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><a href="#cite_ref-5">↑</a></span> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="https://www.britannica.com/art/musical-performance">"Musical performance - The 20th century and beyond"</a>. <i>Encyclopedia Britannica</i> (yn Saesneg)<span class="reference-accessdate">. Cyrchwyd <span class="nowrap">2020-03-30</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Encyclopedia+Britannica&rft.atitle=Musical+performance+-+The+20th+century+and+beyond&rft_id=https%3A%2F%2Fwww.britannica.com%2Fart%2Fmusical-performance&rfr_id=info%3Asid%2Fcy.wikipedia.org%3A20fed+ganrif" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><a href="#cite_ref-6">↑</a></span> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="https://www.britannica.com/place/Hollywood-California">"Hollywood | History, Movies, & Facts"</a>. <i>Encyclopedia Britannica</i> (yn Saesneg)<span class="reference-accessdate">. Cyrchwyd <span class="nowrap">2020-03-30</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Encyclopedia+Britannica&rft.atitle=Hollywood+%7C+History%2C+Movies%2C+%26+Facts&rft_id=https%3A%2F%2Fwww.britannica.com%2Fplace%2FHollywood-California&rfr_id=info%3Asid%2Fcy.wikipedia.org%3A20fed+ganrif" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><a href="#cite_ref-7">↑</a></span> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="https://www.britannica.com/topic/list-of-art-and-design-movements-of-the-20th-century-2004700">"List of art and design movements of the 20th century"</a>. <i>Encyclopedia Britannica</i> (yn Saesneg)<span class="reference-accessdate">. Cyrchwyd <span class="nowrap">2020-03-30</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Encyclopedia+Britannica&rft.atitle=List+of+art+and+design+movements+of+the+20th+century&rft_id=https%3A%2F%2Fwww.britannica.com%2Ftopic%2Flist-of-art-and-design-movements-of-the-20th-century-2004700&rfr_id=info%3Asid%2Fcy.wikipedia.org%3A20fed+ganrif" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><a href="#cite_ref-8">↑</a></span> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="https://www.britannica.com/sports/Olympic-Games">"Olympic Games | History, Locations, & Winners"</a>. <i>Encyclopedia Britannica</i> (yn Saesneg)<span class="reference-accessdate">. Cyrchwyd <span class="nowrap">2020-03-30</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Encyclopedia+Britannica&rft.atitle=Olympic+Games+%7C+History%2C+Locations%2C+%26+Winners&rft_id=https%3A%2F%2Fwww.britannica.com%2Fsports%2FOlympic-Games&rfr_id=info%3Asid%2Fcy.wikipedia.org%3A20fed+ganrif" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><a href="#cite_ref-9">↑</a></span> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="https://www.britannica.com/story/was-the-big-bang-actually-an-explosion">"Was the Big Bang Actually an Explosion?"</a>. <i>Encyclopedia Britannica</i> (yn Saesneg)<span class="reference-accessdate">. Cyrchwyd <span class="nowrap">2020-03-30</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Encyclopedia+Britannica&rft.atitle=Was+the+Big+Bang+Actually+an+Explosion%3F&rft_id=https%3A%2F%2Fwww.britannica.com%2Fstory%2Fwas-the-big-bang-actually-an-explosion&rfr_id=info%3Asid%2Fcy.wikipedia.org%3A20fed+ganrif" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><a href="#cite_ref-10">↑</a></span> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="https://www.webarchive.org.uk/wayback/archive/20151124075144/http://canmlwyddiant.llgc.org.uk/cy/XCM1907/index.html">"Yn y lle hwn - Hyder o'r newydd"</a>. <i>www.webarchive.org.uk</i>. Archifwyd o'r gwreiddiol ar 2015-11-24<span class="reference-accessdate">. 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Archifwyd o'r gwreiddiol ar 2015-11-24<span class="reference-accessdate">. Cyrchwyd <span class="nowrap">2020-04-03</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.webarchive.org.uk&rft.atitle=Yn+y+lle+hwn+-+Cymru+fodern&rft_id=http%3A%2F%2Fcanmlwyddiant.llgc.org.uk%2Fcy%2FXCM1997%2Findex.html&rfr_id=info%3Asid%2Fcy.wikipedia.org%3A20fed+ganrif" class="Z3988"></span><span class="cs1-maint citation-comment">CS1 maint: BOT: original-url status unknown (<a href="/wiki/Categori:CS1_maint:_BOT:_original-url_status_unknown" title="Categori:CS1 maint: BOT: original-url status unknown">link</a>)</span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344"></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Darllen_pellach">Darllen pellach</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=20fed_ganrif&veaction=edit&section=21" title="Golygu'r adran: Darllen pellach" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=20fed_ganrif&action=edit&section=21" title="Edit section's source code: Darllen pellach"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Eric_Hobsbawm" title="Eric Hobsbawm">Hobsbawm, Eric</a>. <i>The Age of Extremes : The Short Twentieth Century 1914-1991</i> (Llundain, Abacus, 1994).</li> <li>Howard, Michael a Louis, William Roger (gol.). <i>The Oxford History of the Twentieth Century</i> (Rhydychen, Gwasg Prifysgol Rhydychen, 2002).</li> <li><a href="/w/index.php?title=J._M._Roberts&action=edit&redlink=1" class="new" title="J. 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