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Oldest Live-Birth Fossil Found; Fish Had Umblical Cord
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5-29-2008 6:05 PM
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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/662222e5-e901-4e23-a75e-2a1216f1910b/09852E0D-31DF-436F-A588-16CCBDBB28C3/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://news.nationalgeographic.com/news/2008/05/080528-mother-fossil.html" href="http://news.nationalgeographic.com/news/2008/05/080528-mother-fossil.html" style="font-size: 11px;">news.nationalgeographic.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.nationalgeographic.com/news/2008/05/080528-mother-fossil.html"><P class="intro"> Remains of the world's oldest known mother have been unearthed in the <A href="http://www3.nationalgeographic.com/places/countries/country_australia.html">Australian</A> outback, scientists say. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.nationalgeographic.com/news/2008/05/080528-mother-fossil.html"><P> The remarkably well-preserved fossil—about 375 to 380 million years old—shows an embryo connected to its mother <A href="http://animals.nationalgeographic.com/animals/fish.html">fish</A> by an umbilical cord. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.nationalgeographic.com/news/2008/05/080528-mother-fossil.html"><div align="center"><img src="http://content6.clipmarks.com/blog_cache/news.nationalgeographic.com/img/657A1542-991B-4FEF-B13A-F3F7EB57793C" alt="fish fossil picture" /></div></blockquote><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content7.clipmarks.com/images/clip-icon.gif" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://news.nationalgeographic.com/news/bigphotos/41691509.html" href="http://news.nationalgeographic.com/news/bigphotos/41691509.html" style="font-size: 11px;">news.nationalgeographic.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.nationalgeographic.com/news/bigphotos/41691509.html"><TABLE border="0" align="center" width="100"><TBODY><TR><TD valign="top" colspan="2"><IMG src="http://news.nationalgeographic.com/news/bigphotos/images/080528-mother-fossil_big.jpg" /> </TD></TR><TR><TD align="left"><A href="http://news.nationalgeographic.com/cgi-bin/email2friend.pl"><IMG border="0" align="top" alt="" class="tool" src="http://news.nationalgeographic.com/news/images/global2004/email.gif" />Email to a Friend</A> </TD><TD align="right"><A href="http://news.nationalgeographic.com/news/2008/05/080528-mother-fossil.html"><< Back to Full Story</A> </TD></TR></TBODY></TABLE></blockquote><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content7.clipmarks.com/images/clip-icon.gif" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://news.nationalgeographic.com/news/2008/05/080528-mother-fossil.html" href="http://news.nationalgeographic.com/news/2008/05/080528-mother-fossil.html" style="font-size: 11px;">news.nationalgeographic.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.nationalgeographic.com/news/2008/05/080528-mother-fossil.html"><P> It is the earliest evidence of a vertebrate giving birth to live young, shifting back the date some 200 million years, said John Long, head of sciences at Museum Victoria in Melbourne, Australia, and lead author of a new study describing the find. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.nationalgeographic.com/news/2008/05/080528-mother-fossil.html"><P> (See a <A href="http://science.nationalgeographic.com/science/prehistoric-world/prehistoric-time-line.html?nav=A-Z">prehistoric time line</A>.) </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.nationalgeographic.com/news/2008/05/080528-mother-fossil.html"><P> The fossil is also the earliest record of vertebrate sex, since live birth occurs when an ovum, or egg, has been fertilized internally by male sex cells. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.nationalgeographic.com/news/2008/05/080528-mother-fossil.html"><P> "Having such advanced reproduction for a fish that primitive is amazing," Long said. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.nationalgeographic.com/news/2008/05/080528-mother-fossil.html">Evidence of live birth—as opposed to egg laying—is extremely rare and has only been found in a few fossils of dolphin-like reptiles called <I>ichthyosaurs</I> and marine lizards known as <I>mosasaurs</I></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;"> </td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/09852E0D-31DF-436F-A588-16CCBDBB28C3/blog/" title="blog or email this clip"><img src="http://content8.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>
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