New genetic light shed on human evolution

Instead of localising the origin of modern humans to a single geographic region in Africa, the researchers discovered a complex record of interbreeding and genetic stratification, challenging the view of evolution in one place. … According to the study, the Khoe-San diverged from other populations more than 100,000 years ago but the genetic structure within the populations dated back to about 35,000 years ago, when it split into a northern and a southern group. [35Kya. There's that number again.]