Did you know that half your DNA isn't human? That somebody, somewhere has exactly the same face? What about the fact that you are as hairy as a chimpanzee, various parts of your body don't belong to you, or that you can read other people's minds? Do you really know why you blush, yawn and cry? Why 90 per cent of laughter has nothing to do with humour? Or what will happen to your mind after you die? Everything you need to know about being human.