Scientists take a closer look at the layers of rock beneath the site of one of the largest asteroid impacts on the planet to see how many asteroids it must have taken to drive the dinosaurs to dinosaurs extinction. Fascinating video from BBC Horizon show 'What Really Killed the Dinosaurs?'.
How many asteroids hit Earth?- What Really Killed the Dinosaurs?
Sunday, July 25, 2010
Subscribe to:
Post Comments (Atom)
0 comments:
Post a Comment