Templeton is the first to suggest expansion out of Africa occurred in three waves: 2 million years ago, 800,000 years ago and 100,000 years ago. If there was some disaster ~80,000 ya which decreased the Homo Sapiens to 5,000-10,000 individuals how can genetic studies of earlier populations be made?
"If there was some disaster ~80,000 ya which decreased the Homo Sapiens to 5,000-10,000 individuals how can genetic studies of earlier populations be made? That was the Toba super volcano 75,000 years ago. The human survival numbers I see are usually 2,000-5,000 worldwide.