Khoisan is the name for several ethnic groups, that share some specific physical and linguistic characteristics. They seem to have a very long history in the region, where they used to live until recently. They seem to have appeared in the southern parts of Africa many ten thousands of years ago. In modern times they lived in South Africa, Namibia and Botswana, and were partly exterminated by the Dutch and English settlers in that area. They show the largest genetical diversity in MtDNA of all human population, which indicates, that they are one of the oldest human communities, that never migrated to an other area.
Physicly the differ a lot from what one is used to regard as "Black people". Some scientists regard them as an independent "race".
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