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Submission + - Giant cosmic impact may have driven humans to farming (sciencedaily.com)

hessian writes: "These new data are the latest to strongly support the controversial Younger Dryas Boundary (YDB) hypothesis, which proposes that a cosmic impact occurred 12,900 years ago at the onset of an unusual cold climatic period called the Younger Dryas. This episode occurred at or close to the time of major extinction of the North American megafauna, including mammoths and giant ground sloths; and the disappearance of the prehistoric and widely distributed Clovis culture. The researchers' findings appear June 11 in the Proceedings of the National Academy of Sciences."
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Giant cosmic impact may have driven humans to farming

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Anything cut to length will be too short.