[beefree]

“100,000 years ago at least”
Historical ‘Science’, not Observational Science

[allmendream]

The observation of genetic divergence and similarity leads one to the ‘historical’ hypothesis that all humans shared a common ancestor around 100,000 years ago.

It is both observational and historical. The observation of diversity within Africa and less diversity spreading out from there, as well as an observation of the cumulative difference and a measurement of the rate of differentiation leads one to ‘out of Africa’ hypothesis and the 100,000 year estimation.