Evidence shows humans arrived in North America much earlier than thought
(NEWSER) - Fossilized feces found in an Oregon cave have scientists rethinking how and when humans first came to North America. At 14,300 years old, the ancient poop was deposited at least 1,000 years before humans were thought to roam the area, National Geographic reports. Discoveries like this "help us to reconstruct the American past," one of the scientists says. More»