Global Warming Not Asteroids Caused Planets Mass Extinct

"If you look at the fossil record, it is just littered with dead bodies from past catastrophes,� observes University of Washington paleontologist Peter Ward.

Source:
http://www.dailygalaxy.com/my_weblog/2010/02/global-warming-not-asteroids-caused-planets-mass-extinction-events-leading-climate-change-experts.html