Somebody mentioned in a comment yesterday that we all had
neanderthal d.n.a. in our genes. But this is not true. Most
native sub-Saharan Africans do not as their ancestors were the
homo sapiens who remained at home when the small group of
humans, who were the ancestors of everybody else in the world,
left Africa and started to colonise the middle east and beyond.
We now know that these migrants definitely mated with the
neanderthals they came across. In fact, there is so much
neanderthal d.n.a. in their descendants and it is so universal
throughout the world that the scientist who conclusively proved
this fact stated that they must have been at it like rabbits (or
words to that effect). What I have not yet come across is any
discussion of how much difference the neanderthal d.n.a. has
created between the human lines that remained in Africa and the
human lines in the rest of the world. Probably because it would
not be considered politically correct to do so. But I think this
discovery does beg interesting ques