To 30,000 years ago. Scientists extracted DNA from the fossilized bones of the fingers and analyzed them to make this amazing discovery. This discovery will rewrite the history of human evolution. It is generally believed that there were only two early humans living on the earth at that time: the ancestors of modern people and the ancestors of cavemen, but then the cavemen became extinct. But DNA evidence from finger bone fossils suggests that a third type of person was still present. The research is based on the analysis of mitochondrial DNA, which is a genetic code that moms can usually pass to their children.