Confirmation An Asteroid Killed Dinos

A team of American and European researchers have confirmed that the Cretaceous-Paleogene extinction -- the event that wiped out roughly 75% of the planet's species, including almost every dinosaur -- was caused by an asteroid impact in Mexico 66 million years ago. The Cretaceous-Paleogene extinction was the last great extinction event to occur on Earth, and is most notable for causing the diversification of mammals that eventually resulted in Homo sapiens."