Today while reading about Tanzania I was reminded that it is the location of what is believed to be our first ancestor, found in 1959 in Ngorongoro Crater. “African Eve” is thought to be 150,000 years old. DNA studies suggest that the oldest known lineages are those of East Africans, most ancient include the Sandawe, Burunge, Gorowa and Datoga, all of whom reside in Tanzania.

Further reading here