Team up with Ackerley the Acanthostega once again to see how mammals came to dominate the planet. Many of them are now extinct - but not the most powerful of all: Homo sapiens - man! Discover facts, fossils and scientific thoughts about - killer pigs, the largest land mammal ever, the earliest hums, the development of Homo sapiens. The fascinating story of life on Earth is told with amazing computer-generated illustrations and fun diagrams, an engaging narrative and loads of humour.