1. Example: the Khoisan people of southern Africa.

2. Many scientists consider the Khoisan a distinct race of very ancient origin.

3. They show that the Khoisan may be a very ancient mix of Asians and black Africans.

4. Many scientists consider the Khoisan a distinct race of very ancient organ.

5. The unique character of the clicking sounds in their language has persuaded some researchers that the Khoisan people are directly descended from the most primitive human ancestors.

6. Populations of Bantu - language speakers who live in southern Africa today are far darker than the Khoisan.