While the exact timing of humans' arrival in the Americas remains contested - and ... And the White Sands footprints preserve a few moments of their early interactions. As Odess interprets them ...

And the findings could lead scientists to take a fresh look at controversial early occupation sites elsewhere in the Americas. "In Brazil, there are several sites where you have stone tools that ...

New discoveries from several archaeological sites in North and South America suggest that ancient people first arrived in the ...