They say we're related to the monkeys, and when you look at humans closely, you can understand why. We share 99 per cent of our DNA with the humble chimpanzee, but obviously we lead rather different lives. So, what is it that makes humans, well, human. That's what anthropologist Alice Roberts is trying to find out. In this documentary she'll be asking what separates us from our closest living relatives, and comparing us with them in a number of categories. From head to toe, she'll be leaving no stone unturned.