Transcription: Welcome to the history of life. The history of what? Life. We live in a world full of wonders. Computers, quantum mechanics, TV talk shows, intergalactic black holes, maple syrup ice cream and shirts that you don't have to iron. But you know the greatest wonder of all? It's life. And I don't just mean living things, although they're pretty amazing too. Now look at this, a long-nosed snake. A perfect machine for living the way that it does. Or this. Or this. The variety and complexity of life on our planet is just totally fascinating. But hey, all of these creatures, whatever they are, share on ...