Brains

S1 E3: Dr Alice Roberts reveals how our body tells the story of human evolution. The way we look, think and behave is a product of a six million year struggle for survival that transformed us from forest dwelling apes to the most powerful species on the planet. Why are we the only one of our kind left today? Was it really our big brains that enabled us to succeed where other human species like the Neanderthals died out?