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Friday, November 02, 2012

Skepticblog » When Humans Nearly Vanished

Skepticblog » When Humans Nearly Vanished: "A number of scientists have argued that the Toba catastrophe nearly wiped out the human race, leaving a genetic bottleneck of only about 1,000 to 10,000 breeding pairs of humans worldwide (Rampino and Self, 1993b; Ambrose, 1998). In addition to the geologic evidence of Toba’s size and atmospheric effects, geneticists have found evidence from the molecular clocks in our genomes that human populations went through a genetic bottleneck at about this time."

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