In actuality, this and many other behaviors we share with chimps were most likely present in our last common ancestor. Tool use and complex social hierarchies are other shared behaviors. The split was some 7 million years ago, if memory serves.
In actuality, this and many other behaviors we share with chimps were most likely present in our last common ancestor. Tool use and complex social hierarchies are other shared behaviors. The split was some 7 million years ago, if memory serves.