Ancient footprints discovered in New Mexico show that humans were walking across North America between 21,000 and 23,000 years ago, researchers said Thursday. “We’d been suspicious of the age for a ...

The discovery was made inWhite Sands National Park, where researchers studying the dry bed of the prehistoric Lake Otero identified dozens of ancient footprints embedded in layers of sediment.

Remarkable fossilized footprints discovered in New Mexico's White Sands National Park have pushed back human presence in ...

Humans were living in what is today the United States thousands of years before archaeology says they did, according to new data derived from very old footprints. Researchers from the University of ...