Lost World

From the deadliest killers to the biggest and strangest beasts, Planet Dinosaur uses the latest CGI and cutting-edge research to bring to life a new and terrifying world of dinosaurs. The series starts in North Africa, where two of the world's biggest predators once battled for supremacy. At 13m and 7 tonnes, the carcharodontosaurus was a huge beast, a gigantic lizard-like carnivore with shark-like teeth over 6 inches long. It was an efficient hunter that would slash at its prey until it bled to death. But the discovery of an upper jaw in Morocco revealed an even bigger carnivorous killer - the spinosaurus. Four metres longer than tyrannosaurus rex, spinosaurus is thought to have been one of the biggest killers to ever walk the Earth. But unlike the meat-eating carcharodontosaurus, the spinosaurus mainly ate fish, living and hunting almost exclusively in the water. Planet Dinosaur takes a look at what a deadly battle between the two may have looked like, and finds out which giant beast would have been most likely to survive a fight to the death.