Mammoth bones and 'ghost' footprints add to heated debate about first humans in North America - NewsDeal

Mammoth bones and “ghost” footprints of ancient people are the latest evidence in a scientific debate about when the first humans reached the Americas. The fossilized bones, in particular, could sugge

Mammoth bones and ghost footprints of ancient people are the latest evidence in a scientific debate about when the first humans reached the Americas.  The fossilized bones, in particular, could sugg… [+5680 chars]

full article...