chimpanzees share 96 per cent or so of their DNA sequences, closer than any other two primates, it then follows that there was a common ancestor of humans and chimps unshared by other great apes. Further work leads to the conclusion that this common ancestor split off from other great apes about 7 million years ago. Humans are thus one of the newer apes. From this lineage it is clear that all humans originated, as Darwin predicted, from Africa.
