Did Dinosaurs Survive When an Asteroid Hit Earth? Scientists Find New Clues
A research team focused on the fossil records of North America, examining them from 18 million years before the end of the Cretaceous period mass extinction. The new analysis suggests increasing evidence that dinosaurs were doing well before an asteroid hit Earth. There has been a long-standing debate in paleontology: were dinosaurs still alive when […]






























































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































