The demise of the dinosaurs, 65 million years ago, did not leave the world empty. A succession of extraordinary creatures has since come and gone, leading to our own ancestors, and yet we know virtually nothing about them. These bizarre beasts were some of the most fascinating creatures ever to have inhabited our planet.
The award-winning team that brought us Walking With Dinosaurs now explores the rise of the mammals. The latest scientific findings, advanced computer graphics and strong natural histories are combined as we return to the sights and sounds of extinct worlds - this time full of life you hardly knew existed.