The study of primates before the separation between humans and chimpanzee is very difficult, especially because it is very difficult to find their fossils. In fact, in Africa they did not know fossils between 7 and 12 million years, so scientists considered that in that period African primates had completely disappeared. According to this theory, the ancestors of man and chimpanzee come from Asia and Europe. But this theory can be erroneous because in Kenya they have found fossils 10 million years ago and are believed to be fossils of those ancestors.