Fossilized feces upends timeline of human's arrival in North America





Fossilized excrement found in an Oregon cave has given scientists the hardest evidence to date that humans roamed the New World at least 1,000 years earlier than previously believed.

The prehistoric poop, deposited in a cave some 14,300 years ago, contains DNA from the forebears of modern-day Native Americans, according to the research.

The discovery reported today by the journal Science added fresh weight to emerging theories that Stone Age people from Asia somehow bypassed ice sheets sealing off North America before 11,000 BC. Nearly all scholars agree that humans were present by then, but until recently few archaeologists accepted that an earlier arrival was even possible because of the formidable ice barriers.



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