A new study of dinosaur biodiversity challenges the belief that the megafauna were on their way out 66 million years ago ...

EDITOR’S NOTE: One remarkable component of the Greater Yellowstone Ecosystem is its complete suite of wild North American ...

Researchers have determined the age and origin of a massive tree that was found at the pre-Columbian city of Cahokia in what ...

Until now, researchers had only uncovered a few tantalizing hints that humans had reached the American continent by this time ...

Newly dated fossils from New Mexico challenge the idea that dinosaurs were in decline—and suggest instead they had formed ...

A new analysis of stone tools offers strong evidence for the theory that ancient people from the Pacific Rim traveled a coastal route from East Asia during the last ice age to become North America's ...

Analysis of a massive wooden monument has uncovered new secrets of Cahokia, America’s greatest lost civilization.

Stories of towering beings once roaming North America have echoed for centuries. Some say the myths hide real prehistoric truths—others call them fantasy.

I first became interested in the Pueblo peoples of the U.S. Southwest in the late 1980s, during a visit to Santa Fe, New ...

From desert carvings to underwater ruins, these ancient structures are so advanced that experts still can’t agree on what ...