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Canadian comet impact fingered for triggering prehistoric climate shift • The Register

Scientists have discovered new evidence that an extraplanetary body came down over Canada around 12,900 years ago, possibly trigging the death of the giant animals then roaming the North American continent, and starting a cooling spell that helped drive mankind towards agriculture and civilization.

During the Younger Dryas climatic period, which kicked off around 13,000 years ago, world temperatures fell sharply, with parts of the northern hemisphere dropping around five degrees Centigrade in a decade or less. The effects lasted for over a thousand years before temperatures warmed up again.

via www.theregister.co.uk




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