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We've also included links to subject-targeted material from <em>Science</em>NOW, the KEs, and <em>Science</em> Careers. </p> <table class="LayoutTable" border="0" cellspacing="0" cellpadding="0"> <tr> <td style="width: 50%;" class="LeftCell"> <div class="Item" id="subject-collections"> <h3><em>Science</em> Subject Collections </h3> <ul class="LinkList"></ul> <form method="post" enctype="application/x-www-form-urlencoded" action="/web/20110706003038/http://www.sciencemag.org/cgi/collection#clicked"> <ul> <li class="coll-1"><input type="hidden" name="expandifhit" value="10044"/><input type="image" src="/web/20110706003038im_/http://www.sciencemag.org/icons/rarrowsm.gif" name="expandval_10044" alt="Expand"/><a name="life-sciences" id="life-sciences"></a>LIFE SCIENCES </li> <li class="coll-1"><input type="hidden" name="expandifhit" value="10045"/><input type="image" src="/web/20110706003038im_/http://www.sciencemag.org/icons/rarrowsm.gif" name="expandval_10045" alt="Expand"/><a name="physical-sciences" id="physical-sciences"></a>PHYSICAL SCIENCES </li> <li class="coll-1"><input type="hidden" name="expandifhit" value="10046"/><input type="image" src="/web/20110706003038im_/http://www.sciencemag.org/icons/rarrowsm.gif" name="expandval_10046" alt="Expand"/><a name="other-subjects" id="other-subjects"></a>OTHER SUBJECTS </li> </ul> </form> </div> <div class="Item"> <h3><em>Science</em> Special Collections </h3> <h4>News</h4> <ul class="LinkList"> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/netwatch">NetWatch</a></li> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/cgi/collection/asia_pacific_news">Asia/Pacific News</a></li> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/cgi/collection/europe_news">European News</a></li> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/cgi/collection/lat_amer_news">Latin American News</a></li> </ul> <h4>Commentary</h4> <ul class="LinkList"> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/cgi/collection/editorial">Editorials</a></li> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/books">Books <em>et al.</em></a></li> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/sciext/educationforum/">Education Forum</a></li> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/cgi/collection/essay">Essays on Science &amp; Society</a></li> </ul> <h4>Research</h4> <ul class="LinkList"> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/cgi/collection/this_week_in_literature">Editors' Choice</a></li> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/cgi/collection/tech_comment">Technical Comments</a></li> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/cgi/collection/techniques">Techniques</a></li> </ul> <h4>Other</h4> <ul class="LinkList"> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/cgi/collection/sci_commun">Scientific Community</a></li> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/cgi/collection/corrections">Corrections</a></li> </ul> </div> </td> <td style="width: 50%;" class="RightCell"> <div class="Item"> <h3>Online Extras</h3> <dl style="padding:5px;border:1px solid #ccc"> <dt>Now in Collections:<br/><span style="position:relative;font-size:110%"><a href="https://web.archive.org/web/20110706003038/http://sageke.sciencemag.org/">The Science of Aging Knowledge Environment Archive Site</a></span>聽<img class="Icon" src="https://web.archive.org/web/20110706003038im_/http://www.sciencemag.org/icons/icon.arrow.53859F.lg.r.gif" alt=">" width="6" height="9"/></dt> <dd><img src="https://web.archive.org/web/20110706003038im_/http://www.sciencemag.org/collections/images/sage_ke.jpg" alt="SAGE Logo"/> The complete article content of <em>Science</em>'s online companion site, which covered the aging-research community from 2001 until it ceased publication in mid-2006. Free to AAAS members and institutional subscribers, and to all other individuals with a free <a href="https://web.archive.org/web/20110706003038/https://pubs.aaas.org/register/reg_setup.asp">registration</a>.<br/><br/><ul class="LinkList"> <li style="font-size:100%"><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/collections/archived/" style="font-weight:400">Other archived collections</a></li> </ul> </dd> </dl> <dl> <dt><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/collections/online/special/"><em>Science</em> Special Issues</a>聽<img class="Icon" src="https://web.archive.org/web/20110706003038im_/http://www.sciencemag.org/icons/icon.arrow.53859F.lg.r.gif" alt=">" width="6" height="9"/></dt> <dd>A guide to special features in our print journal, plus links to related material in <em>Science Signaling</em>, SAGE KE, <em>Science</em>Careers, and elsewhere </dd> <dt><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/sciext/gonzoscientist/">The Gonzo Scientist</a>聽<img class="Icon" src="https://web.archive.org/web/20110706003038im_/http://www.sciencemag.org/icons/icon.arrow.53859F.lg.r.gif" alt=">" width="6" height="9"/></dt> <dd>An occasional column devoted to the intersection among science, culture, and art</dd> <dt>Special Focus Collections </dt> <dd>Collections of articles tied to events or news developments:</dd> </dl> <ul class="LinkList"> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/extra/holden/" style="font-weight:700">Constance Holden, 1941-2010: <em>In Memoriam</em></a></li> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/marketing/si100209/" style="font-weight:700">Special <em>Ardipithecus ramidus</em> Collections</a><br/><span style="font-weight:400">Collection booklets of the original research and other related material (available as reprints or E-prints; no minimum order)</span></li> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/sciext/koshland/" style="font-weight:400">Dan Koshland, 1920-2007: <em>In Memoriam</em></a></li> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/sciext/hwang2005/" style="font-weight:400">Hwang <em>et al</em> and the Stem Cell Controversy</a></li> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/sciext/katrina/" style="font-weight:400">Hurricanes, Climate, and Katrina</a></li> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/sciext/globalvoices/" style="font-weight:400">Global Voices of Science (125th Anniversary Essay/Slide Show Series)</a></li> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/sciext/firstissue/" style="font-weight:400"><em>Science</em>'s First Issues (125th Anniversary Special)</a></li> </ul> <dl> <dt><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/sciext/eletters/">Electronic Letters</a>聽<img class="Icon" src="https://web.archive.org/web/20110706003038im_/http://www.sciencemag.org/icons/icon.arrow.53859F.lg.r.gif" alt=">" width="6" height="9"/></dt> <dd>Our readers' online reactions to articles</dd> <dt><a href="https://web.archive.org/web/20110706003038/http://stke.sciencemag.org/cgi/search?SITESECTION=education&amp;hits=10&amp;fulltext=&amp;searchtemplate=recent_issues_archive&amp;section=STKE%20Teaching+Resources&amp;fullsection=Teaching+Resources"><em>Science Signaling</em> Teaching Resources</a>聽<img class="Icon" src="https://web.archive.org/web/20110706003038im_/http://www.sciencemag.org/icons/icon.arrow.53859F.lg.r.gif" alt=">" width="6" height="9"/></dt> <dd>A portal to the resources available for educators in <em>Science</em>'s signal transduction knowledge environment. </dd> <dt><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/feature/beyond/">Supporting Online Material</a>聽<img class="Icon" src="https://web.archive.org/web/20110706003038im_/http://www.sciencemag.org/icons/icon.arrow.53859F.lg.r.gif" alt=">" width="6" height="9"/></dt> <dd>Additional, online-only material related to <em>Science</em> research papers. </dd> </dl> </div> <div class="Item"> <h3>Archived Collections</h3> <dl> <dt><a href="https://web.archive.org/web/20110706003038/http://aidscience.org/">AIDScience</a>聽<img class="Icon" src="https://web.archive.org/web/20110706003038im_/http://www.sciencemag.org/icons/icon.arrow.53859F.lg.r.gif" alt=">" width="6" height="9"/></dt> <dd>From 2001 to 2003, this online journal provided coverage of the AIDS/HIV prevention and vaccine research scene.</dd> </dl> </div> </td> </tr> </table> </div> </div> <div id="col-2"> <div class="sidebar" id="collections_about_sites"> <h3><span>About Our Sites</span></h3> <ul> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/about">About <em>Science</em></a></li> <li><a href="https://web.archive.org/web/20110706003038/http://news.sciencemag.org/about">About <em>Science</em>NOW</a></li> <li><a href="https://web.archive.org/web/20110706003038/http://stke.sciencemag.org/about">About <em>Science Signaling</em></a></li> <li><a href="https://web.archive.org/web/20110706003038/http://sciencecareers.sciencemag.org/about/">About <em>Science</em> Careers</a></li> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/multimedia/about">About Multimedia</a></li> <li><a href="https://web.archive.org/web/20110706003038/http://www.sciencemag.org/collections/about">About Collections</a></li> </ul> </div> <div class="sidebar" id="alerts"> <h4><span>Alerts &amp; 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