Monday, December 15, 2008

What Killed the Dinosaurs?

The asteroid impact theory of dinosaur extinction has gained prominence since Luis Walter Alvarez proposed it 1980. But the debate over what killed the dinosaurs has continued with volcanic activity long considered another likely suspect. Now new studies have put deadly volcanism, effecting atmospheric and temperature changes, back in focus as a primary cause.

(image credit: illustration Nicolle Rager, National Science Foundation, livescience.com)