In a 2011 genetic study by Ramussen et al. , researchers took a DNA sample from an early 20th century lock of an Aboriginal person’s hair. They found that the ancestors of the Aboriginal population split off from the Eurasian population between 62,000 and 75,000 BP, whereas the European and Asian populations split only 25,000 to 38,000 years BP, indicating an extended period of Aboriginal genetic isolation. These Aboriginal ancestors migrated into South Asia and then into Australia, where they stayed, with the result that, outside of Africa, the Aboriginal peoples have occupied the same territory continuously longer than any other human populations. These findings suggest that modern Aboriginal peoples are the direct descendants of migrants who left Africa up to 75,000 years ago. This finding is compatible with earlier archaeological finds of human remains near Lake Mungo that date to approximately 40,000 years ago.