Mammals and dinosaurs coexisted on Earth until a catastrophic event 66 million years ago killed 75% of life on the planet.

Paleontology is a profession that requires a lot of scientific skill and careful study. But a group of researchers in Utah found that luck also plays a part when they found a group of rare and ...

Seventy-five million years ago, a Cimolodon desosai lived in the waning days of the Cretaceous period. While dinosaurs ruled ...

For years, scientists believed that the only mammals alive during the Jurassic Period, roughly 145 million to 200 million years ago, were small, shrewlike creatures. In 2006, that assumption was upset ...

Add Yahoo as a preferred source to see more of our stories on Google. The Jurassic period was characterized by a warm, wet climate that gave rise to lush vegetation and abundant life. Many new ...