In the ice age 30,000 years ago, Andy treks across snow and ice with the legendary woolly mammoth. And he travels back one million years for an encounter with the biggest killer cat of all time, the sabre-toothed tiger and even manages to meet her cubs! But he's not just taking to the land Andy's underwater adventure takes him back 36 million years in search of the mighty Basilosaurus, a whale four times larger than a great white shark!