Naturalist and explorer Steve Backshall and wildlife presenter Michaela Strachan reveal the hidden secrets of the Ice Age, using state of the art technology to bring this frozen world to life. The second episode sees the pair travel the world to discover how Neanderthals and Homo sapiens survived at a time of brutal environmental change, and uncover why Homo sapiens lived on while the Neanderthals were wiped off the face of the Earth