Transcription: Homo sapiens, that's us, have got a spoken language. Well, lots actually. And that's something that clearly differentiates us from all other creatures. It's a fact that our brain is three times bigger than our nearest evolutionary relatives. But what conclusions can we draw from that? Did our brains get big and then language arrived afterwards as a sort of side consequence or the other way around? And is language something that arose quickly and rapidly or is it something that evolved really slowly through natural selection. See what the experts think.