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

For nearly 30 million years, a 2,000-pound beast known as the entelodont ruled a sweeping empire from Mongolia to what is now Nebraska. With a head that made up almost half of its body length and ...

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 ...

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

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 ...

Thescelosaurus has been at the heart of a prehistoric controversy because ... Thescelosaurus roamed western North America late in the reign of the dinosaurs, from perhaps as early as about 75 ...

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.