And I decided that it seemed to be possibly connected with some other research I had heard about in cancer more recently in Philadelphia, done by a fellow, Carlo Maley, on the evolutionof cancer in humans.
The authors conclude that their findings support a theory that females may have played a similarly important role in the evolutionof tool technology among early humans.
In terms of what makes us human, the most promising areas for exploration are six regions that show very little variation among humans but more variation in chimps suggesting they were important in the human line ofevolution.