A new study has shown that modern birds are essentially living dinosaurs with skulls that are remarkably similar to those of their juvenile ancestors.

It took the Earth 10 million years to recover from a cataclysmic event that wiped out 90% of plant and animal life some 250 million years ago, according to new evidence presented Sunday in the journal Nature Geoscience.

Arthritis, an often debilitating joint disorder that affects millions and millions of people around the world, may have also caused pain and discomfort for dinosaurs and other ancient reptiles more than 150 million years ago.

A basic tenet underpinning scientists' understanding of extinction is that more abundant species persist longer than their less abundant counterparts, but a new University of Georgia study reveals a much more complex relationship.

An analysis of skeletal remains has provided new evidence that humans made it to the Western Hemisphere during the last ice age.