Consensus says that an asteroid killed off the dinosaurs. But could another asteroid or meteor have set the stage for them?
http://www.sciam.com/news/051702/1.html >From the article: "We usually think of asteroid impacts as closing certain chapters of life. But new findings indicate that in the case of dinosaurs, just such a collision may have also permitted their rise to power. Researchers writing today in the journal Science report that geological and paleontological evidence points to a bolide impact occurring around 200 million years ago and clearing the world stage for the dinosaurs' ascent..." Kevin
