Comet Impact Theory:
What killed the megafauna at 10,000 BC?
The Ice Age?
There had been 21 Ice Ages before that, and nowhere near as many mefauna died.
Man the Hunter?
Then why with guns, germs, and steel have we not been able to kill as many species in all the time since then as our ancestors did with only flint weapons in only a few thousand years?
Maybe some new studies have the answers:
USC News on The Cataclysm
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