Comet explosions did not end the prehistoric human culture, known as Clovis, in North America 13,000 years ago, according to research published in the journal Geophysical Monograph Series.
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“The theory has reached zombie status,” said Professor Andrew Scott from the Department of Earth Sciences at Royal Holloway. “Whenever we are able to show flaws and think it is dead, it reappears with new, equally unsatisfactory, arguments.
I don’t think it was ever all that credible, and didn’t get the traction that, say, the blitzkrieg model of Pleistocene extinctions, which some have argued went through similar changes over time to continually account for new findings (lending it something of an air of un-falsifiability). Will try to find more detailed articles on it.