Death of a Dynasty | Walking with Dinosaurs | Episode 6

Several months before the Cretaceous–Paleogene extinction event, the last dinosaurs are living under intense environmental stress due to excessive volcanism. A female Tyrannosaurus abandons her nest, the eggs rendered infertile due to poisonous volcanic gases. Her calls for a mate are answered by a smaller male, who kills a young Triceratops to appease her. Three days later, after repeated copulation, she drives him off. The mother fasts as she tends to her nest, contending with raids by Dromaeosaurus and Didelphodon. Meanwhile, herds of Anatotitan wander between islands of vegetation among the volcanic ash, and Torosaurus rut for the right to mate, while losing their young to attacking dromaeosaurs...