Traskasaura sandrae is a "very odd" mix of primitive and derived traits. A prehistoric sea monster never-before-known to man was hunting prey in North America 85 million years ago, fossils found ...

These ceremonial and burial mounds are one of the densest collections still existing in North America. It's clear ... More: Man Mound is an ancient Indigenous site in Wisconsin.

An ancient slab of Earth's crust buried deep ... The dripping area looks like a large funnel, with rocks from across North America being pulled toward it horizontally before getting sucked down.

An artist's impression of the Late Cretaceous crocodilian Deinosuchus riograndensis and a much smaller, early alligator relative. Márton Szabó More than 75 million years ago, a giant reptile ...

Scientists may have figured out how the earliest known culture in North America spread so rapidly ... remains confirmed to have belonged to the ancient culture are those of an 18-month-old boy ...

Now, running theories of early human movement to North America include boat travel ... accessible mounded Indigenous sites, the ancient Arkansas Mounds in Parkin Archeological State Park, is ...

Lake Tahoe is the oldest lake in North America ... Society of America’s annual meeting on Monday in Anaheim. The finding places Tahoe in the pantheon of the world’s most ancient lakes.