One last question, what has been the greatest fossil hominid discovery since Zinjanthropus and why?
Well, I think, in some ways the Turkana Boy, Homo erectus, was. And I think it was the most important since Zinj because it provided so much more information than just a skull and teeth. It had limb bones, which enabled us to look at limb bones from other taxa. It was sufficiently complete that I think even right-wing fundamentalists had to concede that it is remarkably human and all they can question is its age. I think it was a very solid nail in the plank against creationism. I think more needs to be found, but I think it was a major, major milestone in persuading people that we weren’t making this up on bits and pieces, but there were in fact human looking skeletons 1.6 million years ago.