About 5 million years ago, a giant flying squirrel, the size of a cat, glided over the forests of what is now Tennessee, ...

The continent across the Atlantic Ocean, where wildlife thrives among the varied landscapes: North America is the focus ... as fast at 40 mph (64 kmh). Both animals are found in the same desert ...

Nearly 80 million years ago, a small pond oasis was home to a variety of creatures both in the water and on land. Tropical air-breathing snails lined its shores and shelled creatures lay just below ...

Researchers in Tennessee discover extremely rare fossil of a giant flying squirrel that arrived during the last Ice Age.

In prehistoric North America, the short-faced bear (Arctodus ... these sloths were one of the strangest animals of the ice age. They weighed as much, or more, than the short-faced bear at 1 ...

With a massive body, sharp teeth, and jaws so powerful they could crush a car, this famous carnivore dominated the forested river valleys in western North America during the late Cretaceous period ...

Formed from prehistoric vegetation ... agile, lizard-like animals. Africa collided with eastern North America in the late Pennsylvanian, an event that formed the Appalachian Mountains.