Mammoth bones and 'ghost' footprints fuel heated debate over early humans in North America

Mammoth bones and ‘ghost’ footprints fuel heated debate over early humans in North America

Mammoth bones and the “ghost” footprints of ancient people are the latest evidence for scientific debate about when the first humans reached the Americas. Fossilized bones, in particular, could suggest that people lived in North America tens of thousands of years before the generally accepted date for the arrival of the first Native Americans of …

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