40,000 years ago. Weser River Valley, France. A teenager with a high forehead and a narrow face plunges a spear thrower into a mammoth. Nearby, his sister is painting a bison on the wall with charcoal so that it looks like he's about to jump out of the stone. They don't know that they are called "Cro-Magnons". But they invented the future. Why did fragile African migrants defeat the mighty Neanderthals? The answer is in caves full of sensations. Part 1: Anatomy of a Genius: A Body Made for a Breakthrough How...