Prehistoric Footprints Suggest People Came To The Americas Earlier Than Thought
Early human footprints in New Mexico's White Sands National Park have fascinated researchers for years, but a recent study proposes the so-called "ghost tracks" are even older.
Read more on NPR
Early human footprints in New Mexico's White Sands National Park have fascinated researchers for years, but a recent study proposes the so-called "ghost tracks" are even older.
Read more on NPR
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