The documentary concludes by focusing on dinosaurs' extraordinary ability to adapt to their surroundings, including the nothronychus, a carnivore that gave up eating meat to survive. The film also reveals how, despite their success as hunters or foragers, the creatures fell victim to the deadly illness botulism, and suggests their ultimate downfall came about when a nine-mile-wide asteroid smashed into the Earth, triggering a cataclysmic chain of events that wiped out 60 per cent of all species on the planet.