Mass Extinction Event On the Horizon?


	Mass Extinction Event On the Horizon?

kmcolo

10-7-2008 1:40 PM

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tags:

podcast, science friday, environment, extinction

kmcolo says:

Mass Extinction Event On the Horizon? Nope, were in it now. Any scientist studying some aspect of the environment will tell you that humans are having a massive impact and that the Earth's ecosystem will not tolerate this forever.

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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/c1c92245-a2e5-4d9e-a07e-38ba8d0ccaf9/4472C2B1-FC0B-45AB-A9A5-E8F2FA7FD354/" 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://www.sciencefriday.com/program/archives/200808155" href="http://www.sciencefriday.com/program/archives/200808155" style="font-size: 11px;">www.sciencefriday.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sciencefriday.com/program/archives/200808155"><div align="center"><img src="http://content6.clipmarks.com/blog_cache/www.sciencefriday.com/img/D10D713D-F4CD-4471-975F-2F71CE643721" alt="Array.alttext" /></div></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://www.sciencefriday.com/program/archives/200808155"><P><DIV>Scientists studying many different parts of the planet's ecosystems are warning that Earth may be on the verge of a sixth major mass extinction event. In a series of papers published this week in the Proceedings of the National Academy of Sciences, researchers examining biodiversity around the globe paint a gloomy picture for the planet's species. Warning signs include recent mass die-offs of amphibians and declining fisheries.  </DIV><BR />Over the course of the Earth's history, there have been at least five major extinction events -- the End Ordovician, Late Devonian, End Permian, End Triassic, and End Cretaceous. But are we facing a sixth major extinction period -- and is there anything that can be done about it? In this segment, Ira talks with biologist Paul Ehrlich about what is driving biodiversity loss and what can be done to reverse the trend.  
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