Ancient footprints discovered in White Sands, New Mexico, are challenging long-held beliefs about when humans first arrived ...
Footprints and drag marks from early humans using travois are discovered at White Sands, NM, dating back 22,000 years.
WASHINGTON (AP) — Fossilized footprints discovered in New Mexico indicate that early humans were walking across North America around 23,000 years ago. The footprints were found in a dry lake bed in ...