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Boulders offer new clues about early human migration to the Americas

Boulders offer new clues about early human migration to the Americas

Science
June 1 (UPI) -- Recent archaeological evidence has sparked a new theory of when and how the first people came to the Americas. Scientists now theorize that the first Americans took a coastal route along Alaska's Pacific border to enter the continent. This new theory casts doubt on the conventional one that says the earliest settlers came from Siberia, crossing the now-defunct Bering land bridge on foot and then moving through Canada when corridors opened between massive ice sheets at the end of the last ice age. A new geological study published this week in the journal Science Advances offers compelling evidence to support the new theory. A research team led by the University of Buffalo analyzed boulders and bedrock, traveling by helicopter to four remote islands within the Alexander Arc...