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</div> <div class="info-overlay__body authors-overlay__body"> <div class="authors-overlay__list"> <div class="authors-overlay__author"> <div class="authors-overlay__author-header"> <div class="authors-overlay__author-header-text"> <h4 class="authors-overlay__author-name">Niels Christian Sanden</h4> <p class="authors-overlay__author-title"> Akademisk medarbejder, Institut for Plante- og Miljøvidenskab, Københavns Universitet</p> </div> <div class="authors-overlay__author-header-image"> <div class="authors-overlay__author-image-wrap authors-overlay__author-image"> <img width="150" height="150" src="https://videnskab.dk/wp-content/uploads/2024/01/niels-christian-sanden-150x150.jpg.webp" class="attachment-thumbnail size-thumbnail" alt="" decoding="async" srcset="https://videnskab.dk/wp-content/uploads/2024/01/niels-christian-sanden-150x150.jpg.webp 150w,https://videnskab.dk/wp-content/uploads/2024/01/niels-christian-sanden-125x125.jpg.webp 125w,https://videnskab.dk/wp-content/uploads/2024/01/niels-christian-sanden.jpg.webp 200w" sizes="(max-width: 150px) 100vw, 150px" /> </div> </div> </div> <div class="authors-overlay__author-minibio"> </div> <div class="authors-overlay__author-footer"> <a href="https://videnskab.dk/profil/niels-christian-sanden/" class="btn btn--outlined"> Se Niels’ profil </a> <div class="authors-overlay__author-social-media"> <a href="https://plen.ku.dk/ansatte/?pure=da/persons/410588" target="_blank" class="authors-overlay__author-social-media-icon authors-overlay__author-social-media-icon--homepage icon-share-website"></a> </div> </div> <div class="authors-overlay__author-article-list"> <h5 class="authors-overlay__author-footer-title"> Niels’ seneste artikler </h5> <div class="card-list"> <div class="card card--individual-links card--has-image card--horizontal card--square-image card--taxonomy-theme-2"> <div class="card__inner"> <div class="card__header"> <div class="card__image-wrapper"> <img width="375" height="211" src="https://videnskab.dk/wp-content/uploads/2024/11/almindelig-roen-shutterstock-375x211.jpg.webp" class="attachment-videnskabwp-post-featured-s size-videnskabwp-post-featured-s wp-post-image" alt="En gren af med blade og bær af almindelig røn." decoding="async" fetchpriority="high" srcset="https://videnskab.dk/wp-content/uploads/2024/11/almindelig-roen-shutterstock-375x211.jpg.webp 375w,https://videnskab.dk/wp-content/uploads/2024/11/almindelig-roen-shutterstock-640x360.jpg.webp 640w,https://videnskab.dk/wp-content/uploads/2024/11/almindelig-roen-shutterstock-300x169.jpg.webp 300w,https://videnskab.dk/wp-content/uploads/2024/11/almindelig-roen-shutterstock-575x324.jpg.webp 575w,https://videnskab.dk/wp-content/uploads/2024/11/almindelig-roen-shutterstock-800x450.jpg.webp 800w,https://videnskab.dk/wp-content/uploads/2024/11/almindelig-roen-shutterstock-1190x669.jpg.webp 1190w,https://videnskab.dk/wp-content/uploads/2024/11/almindelig-roen-shutterstock-768x432.jpg.webp 768w,https://videnskab.dk/wp-content/uploads/2024/11/almindelig-roen-shutterstock-904x508.jpg.webp 904w,https://videnskab.dk/wp-content/uploads/2024/11/almindelig-roen-shutterstock-1280x720.jpg.webp 1280w,https://videnskab.dk/wp-content/uploads/2024/11/almindelig-roen-shutterstock-1024x576.jpg.webp 1024w,https://videnskab.dk/wp-content/uploads/2024/11/almindelig-roen-shutterstock-1440x810.jpg.webp 1440w,https://videnskab.dk/wp-content/uploads/2024/11/almindelig-roen-shutterstock-1920x1080.jpg.webp 1920w" sizes="(max-width: 375px) 100vw, 375px" /> <a href="https://videnskab.dk/naturvidenskab/vidste-du-det-plantenavne-kan-afsloere-gamle-traditioner-og-folketro/" class="card__image-invisible-link" aria-hidden="true" tabindex="-1"></a> </div> </div> <div class="card__content"> <div class="card__metadata metadata"> <time class="card__date date" datetime="2024-11-16"> <span class="card__date__marker date__marker"></span> 16. nov. 2024 </time> <span class="card__label metadata__label"> <a href="https://videnskab.dk/genre/forskerne-formidler/"> <span class="card__label-marker metadata__label-marker">\</span> Forskerne Formidler </a> </span> </div> <h3 class="card__title"> <a href="https://videnskab.dk/naturvidenskab/vidste-du-det-plantenavne-kan-afsloere-gamle-traditioner-og-folketro/"> Vidste du det? Plantenavne kan afsløre gamle traditioner og folketro </a> </h3> <div class="card__tags tags"> <a href="https://videnskab.dk/tema/planter/"> <span class="card__tag tag"> Planter </span> </a> </div> </div> </div> </div> <div class="card card--individual-links card--has-image type-marker--podcast card--horizontal card--square-image card--taxonomy-theme-2"> <div class="card__inner"> <div class="card__header"> <div class="card__image-wrapper"> <img width="375" height="211" src="https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-375x211.jpg.webp" class="attachment-videnskabwp-post-featured-s size-videnskabwp-post-featured-s wp-post-image" alt="Ensianblåfugl på græsstrå" decoding="async" srcset="https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-375x211.jpg.webp 375w,https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-640x360.jpg.webp 640w,https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-300x169.jpg.webp 300w,https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-575x324.jpg.webp 575w,https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-800x450.jpg.webp 800w,https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-1190x669.jpg.webp 1190w,https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-768x432.jpg.webp 768w,https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-904x508.jpg.webp 904w,https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-1280x720.jpg.webp 1280w,https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-1024x576.jpg.webp 1024w,https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-1440x810.jpg.webp 1440w,https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-1920x1080.jpg.webp 1920w" sizes="(max-width: 375px) 100vw, 375px" /> <a href="https://videnskab.dk/naturvidenskab/klokkeensian-giver-ensianblaafuglens-kraesne-og-bedrageriske-larver-en-god-start-paa-livet/" class="card__image-invisible-link" aria-hidden="true" tabindex="-1"></a> </div> </div> <div class="card__content"> <div class="card__metadata metadata"> <time class="card__date date" datetime="2024-09-21"> <span class="card__date__marker date__marker"></span> 21. sep. 2024 </time> <span class="card__label metadata__label"> <a href="https://videnskab.dk/genre/forskerne-formidler/"> <span class="card__label-marker metadata__label-marker">\</span> Forskerne Formidler </a> </span> </div> <h3 class="card__title"> <a href="https://videnskab.dk/naturvidenskab/klokkeensian-giver-ensianblaafuglens-kraesne-og-bedrageriske-larver-en-god-start-paa-livet/"> Skrøbelig blomst giver bedrageriske sommerfuglelarver god start på livet </a> </h3> <div class="card__tags tags"> <a href="https://videnskab.dk/tema/natur/"> <span class="card__tag tag"> Natur </span> </a> </div> </div> </div> </div> <div class="card card--individual-links card--has-image type-marker--podcast card--horizontal card--square-image card--taxonomy-theme-2"> <div class="card__inner"> <div class="card__header"> <div class="card__image-wrapper"> <img width="375" height="211" src="https://videnskab.dk/wp-content/uploads/2024/08/opiumvalmue-1-375x211.jpg.webp" class="attachment-videnskabwp-post-featured-s size-videnskabwp-post-featured-s wp-post-image" alt="Opiumvalmue" decoding="async" srcset="https://videnskab.dk/wp-content/uploads/2024/08/opiumvalmue-1-375x211.jpg.webp 375w,https://videnskab.dk/wp-content/uploads/2024/08/opiumvalmue-1-640x360.jpg.webp 640w,https://videnskab.dk/wp-content/uploads/2024/08/opiumvalmue-1-300x169.jpg.webp 300w,https://videnskab.dk/wp-content/uploads/2024/08/opiumvalmue-1-575x324.jpg.webp 575w,https://videnskab.dk/wp-content/uploads/2024/08/opiumvalmue-1-800x450.jpg.webp 800w,https://videnskab.dk/wp-content/uploads/2024/08/opiumvalmue-1-1190x669.jpg.webp 1190w,https://videnskab.dk/wp-content/uploads/2024/08/opiumvalmue-1-768x432.jpg.webp 768w,https://videnskab.dk/wp-content/uploads/2024/08/opiumvalmue-1-904x508.jpg.webp 904w,https://videnskab.dk/wp-content/uploads/2024/08/opiumvalmue-1-1280x720.jpg.webp 1280w,https://videnskab.dk/wp-content/uploads/2024/08/opiumvalmue-1-1024x576.jpg.webp 1024w,https://videnskab.dk/wp-content/uploads/2024/08/opiumvalmue-1-1440x810.jpg.webp 1440w,https://videnskab.dk/wp-content/uploads/2024/08/opiumvalmue-1-1920x1080.jpg.webp 1920w" sizes="(max-width: 375px) 100vw, 375px" /> <a href="https://videnskab.dk/naturvidenskab/i-et-vabenkaplob-med-insekter-har-opiumvalmuen-udviklet-potente-og-farlige-opioider/" class="card__image-invisible-link" aria-hidden="true" tabindex="-1"></a> </div> </div> <div class="card__content"> <div class="card__metadata metadata"> <time class="card__date date" datetime="2024-09-01"> <span class="card__date__marker date__marker"></span> 1. sep. 2024 </time> <span class="card__label metadata__label"> <a href="https://videnskab.dk/genre/forskerne-formidler/"> <span class="card__label-marker metadata__label-marker">\</span> Forskerne Formidler </a> </span> </div> <h3 class="card__title"> <a href="https://videnskab.dk/naturvidenskab/i-et-vabenkaplob-med-insekter-har-opiumvalmuen-udviklet-potente-og-farlige-opioider/"> I et våbenkapløb med insekter har opiumvalmuen udviklet potente og farlige opioider </a> </h3> <div class="card__tags tags"> <a href="https://videnskab.dk/tema/planter/"> <span class="card__tag tag"> Planter </span> </a> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> <div id="overlay-genre-info-forskerne-formidler" class="info-overlay genre-info-overlay 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<h1 class="post-header__title" itemprop="name headline">Hammer og mejsel afslører fortidens planteliv</h1> <div class="post__excerpt"> <p>Jorden under vores fødder gemmer på naturens store historiebog. Ved siden af dinosaurrester finder man flotte fossiler af fortidens planter, der kan lære os meget om Jordens og livets udvikling. </p> </div> <div class="post-featured "> <div class="post-featured__image-wrap"> <picture class="post-featured__picture"><source media="(min-width: 1025px)" srcset="https://videnskab.dk/wp-content/uploads/2024/10/henrik-og-emma-hakker-e1727943936340-1280x720.jpg 1440w" /><source media="(min-width: 721px)" srcset="https://videnskab.dk/wp-content/uploads/2024/10/henrik-og-emma-hakker-e1727943936340-904x508.jpg 1024w" /><source media="(min-width: 401px)" srcset="https://videnskab.dk/wp-content/uploads/2024/10/henrik-og-emma-hakker-e1727943936340-768x432.jpg 720w" /><source srcset="https://videnskab.dk/wp-content/uploads/2024/10/henrik-og-emma-hakker-e1727943936340-375x211.jpg 400w" /><img width="1280" height="720" src="https://videnskab.dk/wp-content/uploads/2024/10/henrik-og-emma-hakker-e1727943936340-1280x720.jpg" class="post-featured__image attachment-videnskabwp-post-featured-xl size-videnskabwp-post-featured-xl wp-post-image" alt="To personer sidder på hug og graver efter fossiler" data-picture="post-featured" data-picture-class="post-featured__image post-featured__picture" data-picture-image-class="post-featured__image post-featured__image" decoding="sync" srcset="https://videnskab.dk/wp-content/uploads/2024/10/henrik-og-emma-hakker-e1727943936340-1280x720.jpg 1280w, https://videnskab.dk/wp-content/uploads/2024/10/henrik-og-emma-hakker-e1727943936340-640x360.jpg 640w, https://videnskab.dk/wp-content/uploads/2024/10/henrik-og-emma-hakker-e1727943936340-300x169.jpg 300w, https://videnskab.dk/wp-content/uploads/2024/10/henrik-og-emma-hakker-e1727943936340-575x324.jpg 575w, https://videnskab.dk/wp-content/uploads/2024/10/henrik-og-emma-hakker-e1727943936340-800x450.jpg 800w, https://videnskab.dk/wp-content/uploads/2024/10/henrik-og-emma-hakker-e1727943936340-1190x669.jpg 1190w, https://videnskab.dk/wp-content/uploads/2024/10/henrik-og-emma-hakker-e1727943936340-375x211.jpg 375w, https://videnskab.dk/wp-content/uploads/2024/10/henrik-og-emma-hakker-e1727943936340-768x432.jpg 768w, https://videnskab.dk/wp-content/uploads/2024/10/henrik-og-emma-hakker-e1727943936340-904x508.jpg 904w, https://videnskab.dk/wp-content/uploads/2024/10/henrik-og-emma-hakker-e1727943936340-1024x576.jpg 1024w, https://videnskab.dk/wp-content/uploads/2024/10/henrik-og-emma-hakker-e1727943936340-1440x810.jpg 1440w, https://videnskab.dk/wp-content/uploads/2024/10/henrik-og-emma-hakker-e1727943936340-1920x1080.jpg 1920w" sizes="(max-width: 1280px) 100vw, 1280px" /></picture> </div> </div> <div class="post-image-meta"> <p>Fossiljægerens to vigtigste redskaber er hakke og tålmodighed. Museumsinspektør Henrik Madsen fra Fossil- og Molermuseet (tv.) har været bidt af fossiler, siden han fandt sit første forstenede søpindsvin, da han gik i fjerde klasse. Siden da har han gravet mange unikke fossiler frem af moleret. (Foto: Niels Christian Sanden)</p> </div> </div> </section> <div class="topbanner_wrapper"> <div class="ad-disclaimer">Annonce:</div> <div class="ad-wrapper-desktop"> <div id="cncpt-lb1"></div> </div> <div class="ad-wrapper-mobile"> <div id="cncpt-mob1"></div> </div> </div> <div id="primary" class="primary" aria-label="Primært indhold"> <main id="main" class="site-main" role="main"> <article id="article-252881" class="post-wrapper post-252881 post type-post status-publish format-standard has-post-thumbnail hentry post_author-niels-christian-sanden genre-forskerne-formidler genre-podcast serie-plantejagten theme-planter theme-evolution"> <div class="post-sidebar post-sidebar--left"> <div class="beyond-words-player__wrapper"> <p class="beyond-words-player__title"> <span class="beyond-words-player__backslash backslash">\</span> Automatisk oplæsning </p> <div data-beyondwords-player="true" contenteditable="false"></div> </div> <div class="share-socialmedia"> <div class="share-socialmedia__inner"> <p class="share-socialmedia__title"> <span class="share-socialmedia__backslash backslash">\</span> Del artikel </p> <div class="share-socialmedia__wrapper"> <a href="https://twitter.com/intent/tweet?text=Hammer+og+mejsel+afsl%C3%B8rer+fortidens+planteliv&url=https%3A%2F%2Fvidenskab.dk%2Fnaturvidenskab%2Fhammer-og-mejsel-afsloerer-fortidens-planteliv%2F" class="share-socialmedia__link share-socialmedia__link--twitter" title="Del på Twitter" rel="noreferrer noopener" target="_blank"> <span class="screen-reader-text">Del på Twitter</span> <span class="share-socialmedia__icon icon-share-twitter"> <svg width="16" height="16" viewBox="0 0 1200 1227" fill="none" xmlns="http://www.w3.org/2000/svg"> <path d="M714.163 519.284L1160.89 0H1055.03L667.137 450.887L357.328 0H0L468.492 681.821L0 1226.37H105.866L515.491 750.218L842.672 1226.37H1200L714.137 519.284H714.163ZM569.165 687.828L521.697 619.934L144.011 79.6944H306.615L611.412 515.685L658.88 583.579L1055.08 1150.3H892.476L569.165 687.854V687.828Z" fill="#000"/> </svg> </span> </a> <a href="https://www.facebook.com/sharer/sharer.php?u=https%3A%2F%2Fvidenskab.dk%2Fnaturvidenskab%2Fhammer-og-mejsel-afsloerer-fortidens-planteliv%2F" class="share-socialmedia__link share-socialmedia__link--facebook" title="Del på Facebook" rel="noreferrer noopener" target="_blank"> <span class="screen-reader-text">Del på Facebook</span> <span class="share-socialmedia__icon icon-share-facebook"></span> </a> <a href="mailto:?subject=Hammer+og+mejsel+afsl%C3%B8rer+fortidens+planteliv&body=https%3A%2F%2Fvidenskab.dk%2Fnaturvidenskab%2Fhammer-og-mejsel-afsloerer-fortidens-planteliv%2F" class="share-socialmedia__link share-socialmedia__link--email" title="Del på email"> <span class="screen-reader-text">Del på email</span> <span class="share-socialmedia__icon icon-share-mail"></span> </a> <a href="#" onclick="window.print()" class="share-socialmedia__link share-socialmedia__link--print" title="Print"> <span class="screen-reader-text">Print</span> <span class="share-socialmedia__icon icon-share-print"></span> </a> </div> </div> </div> </div> <div class="post-sidebar post-sidebar--right"> <div class="sidebar-info authors"> <div class="sidebar-info__inner authors__inner"> <p class="sidebar-info__title authors__title"> <span class="sidebar-info__backslash authors__backslash backslash">\</span> Artiklen er skrevet af </p> <div class="authors__list"> <div class="author"> <div class="author__text"> <span class="author__name">Niels Christian Sanden</span> <span class="author__title"> Akademisk medarbejder og ph.d., Institut for Plante- og Miljøvidenskab, Københavns Universitet</span> </div> <div class="author__image-wrap"> <span class="author__image-info-icon icon-info"></span> <img width="150" height="150" src="https://videnskab.dk/wp-content/uploads/2024/01/niels-christian-sanden-150x150.jpg.webp" class="attachment-thumbnail size-thumbnail" alt="" decoding="async" loading="lazy" srcset="https://videnskab.dk/wp-content/uploads/2024/01/niels-christian-sanden-150x150.jpg.webp 150w,https://videnskab.dk/wp-content/uploads/2024/01/niels-christian-sanden-125x125.jpg.webp 125w,https://videnskab.dk/wp-content/uploads/2024/01/niels-christian-sanden.jpg.webp 200w" sizes="(max-width: 150px) 100vw, 150px" /> </div> </div> </div> </div> </div> <div id="genre-info-forskerne-formidler" class="sidebar-info genre-info genre-info--forskerne-formidler"> <div class="sidebar-info__inner genre-info__inner"> <p class="sidebar-info__title genre-info__title"> <span class="sidebar-info__backslash genre-info__backslash backslash">\</span> Forskerne Formidler </p> <p class="genre-info__text">Videnskab.dk udgiver både artikler skrevet af journalister og forskere. Når forskere står bag, er artiklerne mærket op som 'Forskerne Formidler'.…</p> <div class="sidebar-info__footer genre-info__footer-info"> <span class="sidebar-info__footer-icon genre-info__footer-info-icon icon-info"></span> <span class="sidebar-info__footer-text genre-info__footer-info-text">Læs mere</span> </div> </div> </div> </div> <div class="post-content"> <iframe loading="lazy" data-beyondwords-marker="b4fcbcdc-4b89-42ec-b6e5-404691317904" width="100%" height="95" src="https://embeds.audioboom.com/posts/8581921/embed?v=202301" style="background-color: transparent; display: block; padding: 0; width: 100%" frameborder="0" allowtransparency="allowtransparency" scrolling="no" title="Audioboom player" allow="autoplay" sandbox="allow-downloads allow-forms allow-popups allow-same-origin allow-scripts allow-storage-access-by-user-activation allow-top-navigation-by-user-activation"></iframe> <p data-beyondwords-marker="2ab82b12-cdd0-49bc-88af-10928649b735">»Hak, hak, hak,« lyder det dumpt, idet hammeren rammer det fugtige moler. En gang imellem afveksles lyden af raslende lerklumper, når museumsinspektør og fossiljæger Henrik Madsen fra Fossil- og Molermuseet med sin kæmpehakke løsner ler fra skrænterne i den gamle molergrav.</p> <p data-beyondwords-marker="dfd88291-febe-4502-af0c-569ea8b9dbf7">Han har indvilliget i at tage os med på jagt efter fortidens planter, som de så ud for 55 millioner år siden.</p> <p data-beyondwords-marker="d8203131-8034-46d0-aa3d-01f927a5916a">Plantefossiler åbner en tidsportal, så forskere kan kaste et blik på fortidens vegetation. Gennem den kikkert kan vi blive klogere på fortidens klima og økosystemer og forstå planternes evolutionshistorie.</p> <p data-beyondwords-marker="a00c3f5d-d318-4926-a88e-a7fe9c498e90">Fund af ens plantefossiler i Afrika og Sydamerika var desuden vigtige spor i opdagelsen af, at kontinenterne engang hang sammen i et fælles fortidigt storkontinent.</p> <p data-beyondwords-marker="440c2c5e-9ad2-4996-9d24-e869315105b4">Det ældste kendte landplantefossil er hele 432 millioner år gammelt. På Mors kommer vi dog ikke længere tilbage i tiden end 55 millioner år, da det var her, sedimentlaget, vi graver i, blev dannet.</p> <div data-beyondwords-marker="ec8c53db-17aa-4fb2-9a31-5ffc28dcab28" id="block_4e422da2-6433-4bd7-a081-833425fdd5e3" class="videnskabwp-blocks fact-box fact-box--block_4e422da2-6433-4bd7-a081-833425fdd5e3"><div class="videnskabwp-blocks__inner fact-box__inner"><div class="factbox__content"> <h3 class="factbox__title"> \ Om Plantejagten </h3> <div class="wp-block-videnskabwp-fact-box"> <p data-beyondwords-marker="96a8cd6e-6b48-480d-bff0-5893125b43db"><a href="https://videnskab.dk/serie/plantejagten/">Plantejagten</a> er en podcastserie, som i løbet af 2024 når op på i alt 31 afsnit. Den handler om alle de spændende historier, som vores vilde planter gemmer på.</p> <p data-beyondwords-marker="25391d75-a7c6-44df-844e-fed54c7739b9">På <a href="https://www.instagram.com/plantejagten/" target="_blank" rel="noreferrer noopener">Instagram</a> kan du se billeder af de planter, der indgår i hvert enkelt afsnit.</p> <p data-beyondwords-marker="73ca8ca3-c3dd-4708-92e0-3488641a09d4">Værterne er Emma Aller og Niels Christian Sanden, der begge er postdocer på Institut for Plante- og Miljøvidenskab på Københavns Universitet.</p> <p data-beyondwords-marker="96a8cd6e-6b48-480d-bff0-5893125b43db">Plantejagten er blevet til som et samarbejde mellem Københavns Universitet og Videnskab.dk. Projektet er støttet af Novo Nordisk Fonden.</p> </div> </div> <span class="factbox__toggle"></span> </div></div> <div data-beyondwords-marker="7bed9235-ba5b-4525-b78f-d4463f113e1f" id="block_ac0561ec-4ca2-4686-ab06-fbe8049287d0" class="videnskabwp-blocks image-carousel image-carousel--block_ac0561ec-4ca2-4686-ab06-fbe8049287d0"><div class="videnskabwp-blocks__inner image-carousel__inner"><div class="image-carousel__wrapper"> <div class="image-carousel__grid"> <div class="image-carousel__slider-container"> <div class="image-carousel__slider-extender"> <div class="swiper image-carousel__slider"> <div class="swiper-wrapper"> <div class="swiper-slide image-carousel__slider-item"> <div class="swiper-zoom-container"> <div class="image-carousel__image-container"> <a href="https://videnskab.dk/wp-content/uploads/2024/10/vores-trae-scaled.jpg.webp" data-lightbox="block_ac0561ec-4ca2-4686-ab06-fbe8049287d0" data-title="På vores tur i molergraven fandt vi adskillige fine fossiler blandt andet et lille stykke træ (billede 1) og en hel lille fisk (billede 2). Ingen af vores fund var unikke nok til, at Henrik ville beholde dem på museet, så vi fik dem med hjem. (Foto: Niels Christian Sanden)"> <img loading="lazy" decoding="async" width="2560" height="1707" src="https://videnskab.dk/wp-content/uploads/2024/10/vores-trae-scaled.jpg.webp" class="attachment-full size-full" alt="Et fossil af træ gemmer sig inde i en sten" srcset="https://videnskab.dk/wp-content/uploads/2024/10/vores-trae-scaled.jpg.webp 2560w,https://videnskab.dk/wp-content/uploads/2024/10/vores-trae-300x200.jpg.webp 300w,https://videnskab.dk/wp-content/uploads/2024/10/vores-trae-1024x683.jpg.webp 1024w,https://videnskab.dk/wp-content/uploads/2024/10/vores-trae-768x512.jpg.webp 768w,https://videnskab.dk/wp-content/uploads/2024/10/vores-trae-1536x1024.jpg.webp 1536w,https://videnskab.dk/wp-content/uploads/2024/10/vores-trae-2048x1365.jpg.webp 2048w,https://videnskab.dk/wp-content/uploads/2024/10/vores-trae-335x223.jpg.webp 335w,https://videnskab.dk/wp-content/uploads/2024/10/vores-trae-728x485.jpg.webp 728w,https://videnskab.dk/wp-content/uploads/2024/10/vores-trae-904x603.jpg.webp 904w,https://videnskab.dk/wp-content/uploads/2024/10/vores-trae-620x413.jpg.webp 620w" sizes="(max-width: 2560px) 100vw, 2560px" /> </a> </div> <div class="image-carousel__alt"> På vores tur i molergraven fandt vi adskillige fine fossiler blandt andet et lille stykke træ (billede 1) og en hel lille fisk (billede 2). Ingen af vores fund var unikke nok til, at Henrik ville beholde dem på museet, så vi fik dem med hjem. (Foto: Niels Christian Sanden) </div> </div> </div> <div class="swiper-slide image-carousel__slider-item"> <div class="swiper-zoom-container"> <div class="image-carousel__image-container"> <a href="https://videnskab.dk/wp-content/uploads/2024/10/vores-fisk-scaled.jpg.webp" data-lightbox="block_ac0561ec-4ca2-4686-ab06-fbe8049287d0" data-title=""> <img loading="lazy" decoding="async" width="2560" height="1707" src="https://videnskab.dk/wp-content/uploads/2024/10/vores-fisk-scaled.jpg.webp" class="attachment-full size-full" alt="" srcset="https://videnskab.dk/wp-content/uploads/2024/10/vores-fisk-scaled.jpg.webp 2560w,https://videnskab.dk/wp-content/uploads/2024/10/vores-fisk-300x200.jpg.webp 300w,https://videnskab.dk/wp-content/uploads/2024/10/vores-fisk-1024x683.jpg.webp 1024w,https://videnskab.dk/wp-content/uploads/2024/10/vores-fisk-768x512.jpg.webp 768w,https://videnskab.dk/wp-content/uploads/2024/10/vores-fisk-1536x1024.jpg.webp 1536w,https://videnskab.dk/wp-content/uploads/2024/10/vores-fisk-2048x1365.jpg.webp 2048w,https://videnskab.dk/wp-content/uploads/2024/10/vores-fisk-335x223.jpg.webp 335w,https://videnskab.dk/wp-content/uploads/2024/10/vores-fisk-728x485.jpg.webp 728w,https://videnskab.dk/wp-content/uploads/2024/10/vores-fisk-904x603.jpg.webp 904w,https://videnskab.dk/wp-content/uploads/2024/10/vores-fisk-620x413.jpg.webp 620w" sizes="(max-width: 2560px) 100vw, 2560px" /> </a> </div> <div class="image-carousel__alt"> </div> </div> </div> </div> </div> </div> </div> <div class="swiper-navigation"> <div class="swiper-button-prev"></div> <div class="swiper-button-next"></div> </div> <div class="swiper-counter"> <span class="current">1</span> / <span class="total">2</span> </div> </div> </div> </div></div> <h2 data-beyondwords-marker="370d15ac-55c1-4d95-9ef8-a27bf06adbf0" class="wp-block-heading">Fantastiske fossiler i døde alger fra et 55 millioner år gammelt hav</h2> <p data-beyondwords-marker="cd9cb737-f853-4d07-bf3f-71a07926615f">Moler består af gamle kiselalger, eller diatoméer, der er encellede alger med en hård skal af silicium. Over en periode på cirka 1,5 millioner år i den geologiske epoke Eocæn stortrivedes disse alger i Nordatlanten, hvor kontinentaldriften endnu ikke havde skabt den geografi, vi kender i dag.</p> <p data-beyondwords-marker="b57452bc-8d6a-4eda-a955-7daf05db34c0">Grønland lå endnu klos op ad Skandinavien og De Britiske Øer, mens det, der skulle blive til Danmark, var dækket af hav.</p> <div class="videnskabwp-blocks advertisements"> <div class="videnskabwp-blocks__inner advertisements__inner"> <div class="ad-disclaimer">Annonce:</div> <div class="ad-wrapper-desktop"> <div id="cncpt-lb2"></div> </div> <div class="ad-wrapper-mobile"> <div id="cncpt-mob2"></div> </div> </div> </div> <p data-beyondwords-marker="581eef0b-800d-4d0c-8511-6c8f8442233b">Algerne trivedes så godt, at der på havbunden under dem var alvorligt iltsvind. Iltsvindet betød, at en fisk, en fugl eller en plante, der måtte ende på bunden, ikke blev nedbrudt, men blot indkapslet i dynen af nedfaldne alger.</p> <p data-beyondwords-marker="1ee2f134-8bec-4e7b-a5bb-96e225a9af08">Over millioner af år blev algemåtten omdannet til moler. De bevarede dyr og planter blev efterhånden mast sammen og efterlod et ommineraliseret aftryk, idet kiselalgerne blev til sediment. Disse aftryk kan vi grave frem i dag og være heldige at se i fuld figur, med et velrettet slag på den helt rigtige lerklump.</p> <div data-beyondwords-marker="3decad35-0ca1-4973-b260-9a06582bb5dc" id="block_21d335cb-5e6e-43f7-99d9-6bfc2f70b503" class="videnskabwp-blocks image-carousel image-carousel--block_21d335cb-5e6e-43f7-99d9-6bfc2f70b503"><div class="videnskabwp-blocks__inner image-carousel__inner"><div class="image-carousel__wrapper"> <div class="image-carousel__grid"> <div class="image-carousel__slider-container"> <div class="image-carousel__slider-extender"> <div class="swiper image-carousel__slider"> <div class="swiper-wrapper"> <div class="swiper-slide image-carousel__slider-item"> <div class="swiper-zoom-container"> <div class="image-carousel__image-container"> <a href="https://videnskab.dk/wp-content/uploads/2024/10/louise-i-studie-scaled.jpg.webp" data-lightbox="block_21d335cb-5e6e-43f7-99d9-6bfc2f70b503" data-title="I dette afsnit af Plantejagten har vi Louise Isager Ahl (tv.) i studiet. Hun er palæobotaniker på Statens Naturhistoriske Museum og fortæller om fossilers betydning for planteforskning og om, hvordan hun selv søger ny viden i gamle plantefossiler. (Foto: Niels Christian Sanden) "> <img loading="lazy" decoding="async" width="2560" height="1707" src="https://videnskab.dk/wp-content/uploads/2024/10/louise-i-studie-scaled.jpg.webp" class="attachment-full size-full" alt="" srcset="https://videnskab.dk/wp-content/uploads/2024/10/louise-i-studie-scaled.jpg.webp 2560w,https://videnskab.dk/wp-content/uploads/2024/10/louise-i-studie-300x200.jpg.webp 300w,https://videnskab.dk/wp-content/uploads/2024/10/louise-i-studie-1024x683.jpg.webp 1024w,https://videnskab.dk/wp-content/uploads/2024/10/louise-i-studie-768x512.jpg.webp 768w,https://videnskab.dk/wp-content/uploads/2024/10/louise-i-studie-1536x1024.jpg.webp 1536w,https://videnskab.dk/wp-content/uploads/2024/10/louise-i-studie-2048x1365.jpg.webp 2048w,https://videnskab.dk/wp-content/uploads/2024/10/louise-i-studie-335x223.jpg.webp 335w,https://videnskab.dk/wp-content/uploads/2024/10/louise-i-studie-728x485.jpg.webp 728w,https://videnskab.dk/wp-content/uploads/2024/10/louise-i-studie-904x603.jpg.webp 904w,https://videnskab.dk/wp-content/uploads/2024/10/louise-i-studie-620x413.jpg.webp 620w" sizes="(max-width: 2560px) 100vw, 2560px" /> </a> </div> <div class="image-carousel__alt"> I dette afsnit af Plantejagten har vi Louise Isager Ahl (tv.) i studiet. Hun er palæobotaniker på Statens Naturhistoriske Museum og fortæller om fossilers betydning for planteforskning og om, hvordan hun selv søger ny viden i gamle plantefossiler. (Foto: Niels Christian Sanden) </div> </div> </div> <div class="swiper-slide image-carousel__slider-item"> <div class="swiper-zoom-container"> <div class="image-carousel__image-container"> <a href="https://videnskab.dk/wp-content/uploads/2024/10/ginkgo1-scaled.jpg.webp" data-lightbox="block_21d335cb-5e6e-43f7-99d9-6bfc2f70b503" data-title="Disse 180 millioner år gamle fossile blade fra en uddød slægtning til tempeltræet (<i>Ginkgo sp.</i>) er ikke forstenede, men snarere mumificerede. Derfor har palæobotaniker Louise Isager Ahl fra Statens Naturhistoriske Museum sat sig for at undersøge, om hun kan finde spor af sukkerstoffer i de gamle cellevægge. (Foto: Niels Christian Sanden)"> <img loading="lazy" decoding="async" width="2560" height="1707" src="https://videnskab.dk/wp-content/uploads/2024/10/ginkgo1-scaled.jpg.webp" class="attachment-full size-full" alt="Et fossileret blad ligger på et bord" srcset="https://videnskab.dk/wp-content/uploads/2024/10/ginkgo1-scaled.jpg.webp 2560w,https://videnskab.dk/wp-content/uploads/2024/10/ginkgo1-300x200.jpg.webp 300w,https://videnskab.dk/wp-content/uploads/2024/10/ginkgo1-1024x683.jpg.webp 1024w,https://videnskab.dk/wp-content/uploads/2024/10/ginkgo1-768x512.jpg.webp 768w,https://videnskab.dk/wp-content/uploads/2024/10/ginkgo1-1536x1024.jpg.webp 1536w,https://videnskab.dk/wp-content/uploads/2024/10/ginkgo1-2048x1365.jpg.webp 2048w,https://videnskab.dk/wp-content/uploads/2024/10/ginkgo1-335x223.jpg.webp 335w,https://videnskab.dk/wp-content/uploads/2024/10/ginkgo1-728x485.jpg.webp 728w,https://videnskab.dk/wp-content/uploads/2024/10/ginkgo1-904x603.jpg.webp 904w,https://videnskab.dk/wp-content/uploads/2024/10/ginkgo1-620x413.jpg.webp 620w" sizes="(max-width: 2560px) 100vw, 2560px" /> </a> </div> <div class="image-carousel__alt"> Disse 180 millioner år gamle fossile blade fra en uddød slægtning til tempeltræet (<i>Ginkgo sp.</i>) er ikke forstenede, men snarere mumificerede. Derfor har palæobotaniker Louise Isager Ahl fra Statens Naturhistoriske Museum sat sig for at undersøge, om hun kan finde spor af sukkerstoffer i de gamle cellevægge. (Foto: Niels Christian Sanden) </div> </div> </div> </div> </div> </div> </div> <div class="swiper-navigation"> <div class="swiper-button-prev"></div> <div class="swiper-button-next"></div> </div> <div class="swiper-counter"> <span class="current">1</span> / <span class="total">2</span> </div> </div> </div> </div></div> <h2 data-beyondwords-marker="619526c0-90dd-4671-83ad-a24b154a34f5" class="wp-block-heading">På spor efter 180 millioner år gamle planteceller</h2> <p data-beyondwords-marker="5fd7a7e0-f67a-41cb-9d77-a23e82a81c83">Louise Isager Ahl har en baggrund i planters sukkerstofsammensætning. Hun fik en vild ide og har nu kastet sig over fossile planter. Hun undersøger, om det er muligt at finde sukkerstoffer i de mange millioner år gamle cellevægge, man kan se i plantefossilerne.</p> <p data-beyondwords-marker="41db2960-5cdb-4267-ae57-f58f6b0e97ef">Det er svært at bruge moderne molekylærbiologiske metoder på fossiler, da de oprindelige biologiske materialer efter millioner af år i jorden ofte har måttet vige pladsen for mineraler. Eksempelvis nedbrydes DNA »hurtigt«, og det ældste DNA, det er lykkes forskere at aflæse, er »blot« to millioner år gammelt.</p> <p data-beyondwords-marker="4098ba16-6bf8-4b34-8def-9c65a27a68c4">Selvom det er ufattelig lang tid, er det kun et splitsekund af evolutionshistorien. Forestil dig, at du forsøger at forstå en bog på 3.500 sider (det kunne være den samlede ’Harry Potter’-serie), ud fra teksten på de sidste to sider.</p> <p data-beyondwords-marker="496ff3d0-8916-4d12-8a95-e14d027610af">Det bliver spændende at se, om sukker viser sig særligt sejlivet i sammenligning med eksempelvis DNA. Hvis Louise lykkes med at afkode fossilernes sukkerstoffer, kan hun fylde 180 sider ud med ord på et andet sprog end DNA’ets og kaste nyt lys på vejen, der ledte fra de første planter, til dem vi har i dag. I vores ’Harry Potter’-moppedreng på 3.500 sider kan vi altså måske snart få lov at læse lidt i den sidste tredjedel af seriens sidste bog.</p> <p data-beyondwords-marker="d036be9b-fa8c-494b-a55a-6ee30f3a7e43">Du kan høre, hvordan det gik på vores fossiljagt og blive klogere på Louises fossilforskning i denne uges afsnit af Plantejagten. Du finder den i afspilleren øverst i artiklen, eller hvor du henter podcast.</p> <div class="videnskabwp-blocks advertisements"> <div class="videnskabwp-blocks__inner advertisements__inner"> <div class="ad-disclaimer">Annonce:</div> <div class="ad-wrapper-desktop"> <div id="cncpt-lb3"></div> </div> <div class="ad-wrapper-mobile"> <div id="cncpt-mob3"></div> </div> </div> </div> <figure data-beyondwords-marker="d9a3bdba-efb6-4834-9b8a-bee2a0bb5101" class="wp-block-image size-large"><img loading="lazy" decoding="async" width="898" height="1024" src="https://videnskab.dk/wp-content/uploads/2024/10/sequoia-898x1024.jpg.webp" alt="Et billede af en fossil af en kvist" class="wp-image-252887" srcset="https://videnskab.dk/wp-content/uploads/2024/10/sequoia-898x1024.jpg.webp 898w,https://videnskab.dk/wp-content/uploads/2024/10/sequoia-263x300.jpg.webp 263w,https://videnskab.dk/wp-content/uploads/2024/10/sequoia-768x875.jpg.webp 768w,https://videnskab.dk/wp-content/uploads/2024/10/sequoia.jpg.webp 1080w" sizes="(max-width: 898px) 100vw, 898px" /><figcaption class="wp-element-caption">Kvist fra slægtning til rødtræ (<i>Sequoia sp.</i>) fra Fossil- og Molermuseets samling. (Foto: Niels Christian Sanden)</figcaption></figure> <div data-beyondwords-marker="9e6cccb8-e299-4ded-9a94-e8de242c9c7d" id="block_5ff753fd-d719-42c2-870d-6a083724ee7d" class="videnskabwp-blocks read-also read-also--block_5ff753fd-d719-42c2-870d-6a083724ee7d"><div class="videnskabwp-blocks__inner read-also__inner"><h2 class="block-title"> <span class="read-also__backslash backslash" style="">\</span> Læs også </h2> <div class="card-list card-list--horizontal" id="block-"> <div class="card card--horizontal card--section-1 card--has-image type-marker--podcast"> <a href="https://videnskab.dk/naturvidenskab/klokkeensian-giver-ensianblaafuglens-kraesne-og-bedrageriske-larver-en-god-start-paa-livet/" class="card__inner" aria-labelledby="card-title"> <div class="card__image-wrapper"> <img loading="lazy" decoding="async" width="125" height="125" src="https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-125x125.jpg.webp" class="attachment-post-thumbnail size-post-thumbnail wp-post-image" alt="Ensianblåfugl på græsstrå" srcset="https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-125x125.jpg.webp 125w,https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-150x150.jpg.webp 150w,https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-640x640.jpg.webp 640w,https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-360x360.jpg.webp 360w,https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-375x375.jpg.webp 375w,https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-768x768.jpg.webp 768w,https://videnskab.dk/wp-content/uploads/2024/09/ensianblaafugl-shutterstock-440012371-1024x1024.jpg.webp 1024w" sizes="(max-width: 125px) 100vw, 125px" /> </div> <div class="card__content"> <h3 class="card__title">Skrøbelig blomst giver bedrageriske sommerfuglelarver god start 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om </h3> <div class="source__author"> <a href="https://videnskab.dk/profil/niels-christian-sanden/"> Niels Christian Sanden </a> </div> </div> <div class="source__footnotes"> Læs om <a href="https://www.videnskab.dk/rettigheder/">brug og viderebringelse</a> af Videnskab.dk’s artikler. </div> </div> <span class="source__toggle"></span> </div></div> </div> </article> </main> </div> <section class="post-footer" aria-label="Sideindholds bundsektion"> <div class="post__tags-container"> <h3 class="post-tags__title"> <span class="post-tags__backslash backslash">\</span> Find mere om </h3> <div class="post__tags-wrapper tags-wrapper"> <a href="https://videnskab.dk/tema/planter/" class="post__tag tag" title="Gå til Planter"> Planter </a> <a href="https://videnskab.dk/tema/evolution/" class="post__tag tag" title="Gå til Evolution"> Evolution </a> </div> </div> <div id="newsletter-block-article-bottom" class="videnskabwp-blocks newsletter newsletter--newsletter-block-article-bottom"><div 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