onet_feed
28th August 2008, 02:11 AM
A fall in levels of atmospheric carbon dioxide, close to that of pre-industrial times, explains the transition from a mostly ice-free Greenland of three million years ago to the ice-covered region we see today.
More... (http://www.sciencedaily.com/releases/2008/08/080827163818.htm)
More... (http://www.sciencedaily.com/releases/2008/08/080827163818.htm)