Jim I believe Cro-Magnon has been traced fairly well as the big spring thaw was happening.For fun fact finding concider that one one the biggest questions for sicence that delves into these thinks is how the black man came to Africa and why. The black race as we know it today did not start in Africa but many ended up there.Imageine 20,000 years ago peoples crossing oceans and finding land and then waiting for the Euros to find them so they and their land could get a name.Folks ran around Africa and other lands not knowing what things were and then POP someone would show up and say thats my Zebra ect. and the natives said great cause we didn't have a clue