Interesting take from SteveF:
- Homo sapiens sapiens, our species, is widely held to have evolved in Africa several hundred thousand years ago.
- Several other near-human species have existed at the same time as H.sap.sap., collectively known as genus Homo or the human clade.
- Interbreeding took place between the different species in the clade. Not just mating behavior, but fertile offspring.
- Interbreeding between Neanderthals and humans took place around 50,000 years ago, as confirmed by DNA analysis of de-iced corpses. Quite likely earlier, but not much later because Neanderthals went extinct around 40,000 years ago.
- Most humans living today have a few percent Neanderthal DNA.
- Sub-saharan Africans have little to no Neanderthal DNA, with any that they have being the result of relatively recent mixture from other humans coming to Africa from Arabia or Europe.
If you can’t guess where he’s going with this, read on to find out. It’s a damned intriguing hypothesis, I think, and a concise but thorough presentation of it.