Big Brains Arose Separately in Multiple Primate Groups


	Big Brains Arose Separately in Multiple Primate Groups

Socratoad

7-19-2008 5:43 PM

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7-19-2008 6:12 PM

qwerky

whoa, kinda like how people say Egypt, Inca, Aztec civilations developped much the same, but independent form each other

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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://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/145426ab-8a2d-49db-8b7c-b63796ee9853/FDC18571-2A7B-4059-B98E-BEB75DEAFD9C/" 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/2008/07/080718-bigger-brains.html" href="http://news.nationalgeographic.com/news/2008/07/080718-bigger-brains.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/2008/07/080718-bigger-brains.html"><H1 class="newsTitle">Big Brains Arose Separately in Multiple Primate Groups</H1></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/2008/07/080718-bigger-brains.html"><P class="intro">
The ancestors of modern-day primates in the Americas had tiny <A href="http://science.nationalgeographic.com/science/health-and-human-body/human-body/brain-article.html">brains</A> just like their counterparts in Africa and Eurasia, according to a new study.
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Because modern anthropoid, or humanlike, primates in both regions have large brains relative to their body sizes, the finding suggests that one of the hallmarks of primate biology—increasing brain size—happened independently in isolated groups.
								</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/2008/07/080718-bigger-brains.html"><P>
An increase in brain size relative to body size is called encephalization. 
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The new research is based on 80 different measurements taken of the skulls, jaws, and teeth of 17 living New World monkeys, such as capuchins and marmosets, to determine which features are the best predictors of body size.
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Animals with large encephalization quotients, or EQs, are those with bigger brains relative to their body sizes compared to the group average. 
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