Asteroid that killed the dinosaurs was as strong as 10 billion atomic bombs, study says

When a colossal space rock came crashing down 66 million years ago onto what is now the Yucatan Penninsula in Mexico, it triggered widespread changes on Earth and abruptly ended the reign of the dinosaurs. Now, researchers are focusing on learning the extent of the asteroid's destructive might and the immediate aftermath at ground zero, a location now known as the Chicxulub crater. A new study led by the University of Texas at Austin went straight to the source, scouring the site of the impact a...