Different groups of Negroes evolved separately from each other, continuously for as long as 260,000 - 350,000 years. Although they lived on the same continent, some credited nearly 350,000 years of separate evolution! We are talking about the San group. Scientists studied the skeleton of a representative of this group - a skeleton dated to 2,000 years ago. The others evolved separately, that is, they did not mix gerns with any of the other 44 groups from 35,000 years, to 160,000 years. A study of Africa's evolutionary history based on genome sequencing of 44 indigenous African populations. Genetic analyses indicate a complex demographic history and adaptation to diverse environments. A mixed genetic heritage is observed, with high genomic diversity between different ethnic groups.