Maybe H.G. Wells did have a time machine, but got confused as to when he was.
Ancient humans started down the path of evolving into two separate species before merging back into a single population, a genetic study suggests.
The genetic split in Africa resulted in distinct populations that lived in isolation for as much as 100,000 years, the scientists say.
This could have been caused by arid conditions driving a wedge between humans in eastern and southern Africa.
Apparently the two main genetic “groups” are Khoisan and everybody else. I recall reading about the differences in Khoisan in Guns, Germs, and Steel, but can’t recall all the details. It could be an interesting study to see what the differences are now, and compare how those difference can effect the overall human population.