When did humans almost go extinct?

When did humans almost go extinct?

70,000 B.C. How Human Beings Almost Vanished From Earth In 70,000 B.C. : Krulwich Wonders… By some counts of human history, the number of humans on Earth may have skidded so sharply that we were down to just 1,000 reproductive adults. And a supervolcano might have been to blame. Oct 22, 2012

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