It makes fairly logical sense. Neanderthals were fairly well-installed in Europe when modern humans appeared in Africa. As modern humans would have expanded northward into Europe, done their thing with the Neanderthals, (some breeding, lots of killing), and continued eastward, so the human population still in Africa would probably have no Neanderthal DNA, but the population in Asia would carry the results of some interbreeding with Neanderthals.
The question this brings up is how different are Neanderthals from Homo sapiens? I was taught that the definition of a species is that two individuals could reproduce and have fertile offspring. It seems there are exceptions to this rule, (as Neanderthals and Homo sapiens are different species).
The question this brings up is how different are Neanderthals from Homo sapiens? I was taught that the definition of a species is that two individuals could reproduce and have fertile offspring. It seems there are exceptions to this rule, (as Neanderthals and Homo sapiens are different species).