Comets and Woolly Mammoths

New evidence suggests that a comet collision might have been the trigger for the Younger Dryas, contributing to North America’s megafauna extinction. UC Santa Barbara’s James Kennett, professor emeritus in the Department of Earth Science, posits that such an extraterrestrial event did occur killing off woolly mammoths, giant ground sloths and saber-tooth tigers 12,900 years ago.
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