Find out more about evolution. In biology, the theory of evolution is based on the idea that all species are related and gradually change over time.
An epic four-part documentary series which brings to life the most incredible dinosaurs that ever existed. From Spinosaurus, the biggest killer to ever walk the Earth, to the immense sea-monster Predator X, and the deadly cannibalistic Majunasaurus - dinosaurs were more monstrous, more horrific and bizarre than ever before imagined.