<![CDATA[extinction and global warming Resources | ZDNet]]> en-us <![CDATA[Global warming and mass extinctions--it's happened before]]> Thu, 10 Jan 2008 15:07:00 -0800 <![CDATA[Global warming and mass extinctions--it's happened before]]> Thu, 10 Jan 2008 06:55:48 -0800 <![CDATA[Global warming, not asteroid, cause of extinction?]]> Thu, 20 Jan 2005 18:22:00 -0800