Fossil footprints show humans in North America more than 21,000 years ago

The tracks at one location have been revealed as both the earliest known footprints and the oldest firm evidence of humans anywhere in the Americas, showing that people lived there 21,000 to 23,000 years ago — several thousand years earlier than scientists once believed.

Fossilized human footprints have now been found throughout the east of the national park, where the bed of a “paleo-lake,” which is now dry, supplies the gypsum-rich earth that is eroded by the wind to create the enormous white dunes for which the region is famous.

NBC Fossil footprints show humans in North America more than 21,000 years ago