Keep going in time, we come to cave art. And, of course, we're familiar with the cave paintings. These are not only early Homo sapiens, but also in some cases Neanderthals. We do know that now. This is a relatively recent discovery, that we are not the only cave painters, but what's fascinating for me about this is you have these glorious depictions of animals that these people hunted, but in addition to that, some very mystical and fantastic figures. A bird-headed man in Lascaux cave in France. A human that is part bison.