Resumen de The return to Africa that time forgot
When human species migrated out of Africa around 65,000 years ago, many African populations that stayed behind became genetically isolated from the rest of humanity until European colonialism. Or so people thought: an analysis of DNA from what is supposedly one of the most distantly isolated of all African populations has revealed the presence of genetic material from western Eurasia. The unusual DNA most closely matched sequences found today in southern Europeans. Dating methods suggested the snippets made their way into the Khoisan genome between 900 and 1,800 years ago--well before known European contact with southern Africa.
