Mara
May 14th, 2004, 07:11 am
Millions of years before the dinosaurs vanished, an even bigger mass extinction wiped out more than 90 percent of the species on Earth. Now scientists think they may have evidence of an impact crater that contributed to the “Great Dying.”
http://www.msnbc.msn.com/id/4969840/
http://www.msnbc.msn.com/id/4969840/