Cretaceous–Paleogene extinction event Cretaceous–Paleogene extinction event The Cretaceous–Paleogene (K–Pg) extinction event, also known as the Cretaceous–Tertiary (K–T) extinction, was a sudden mass extinction of some three-quarters of the plant and animal species on Earth, approximately 66 million years ago. With the exception of some ectothermic species such as the leatherback sea turtle and crocodiles, no tetrapods weighing more than survived. It marked the end of the Cretaceous period and with it, the entire Mesozoic Era, opening the Cenozoic Era that continues today. In the geologic record, the K–Pg event is marked by a thin layer of sediment called the K–Pg boundary, which can
Dinosaurs: Giants of Patagonia Dinosaurs: Giants of Patagonia Dinosaurs: Giants of Patagonia is a 2007 film about life in the Early Cretaceous, Patagonia. It features paleontologist Rodolfo Coria and his work, with Donald Sutherland acting as main narrator. The movie opens on a scene from approximately 65 million years ago, in the Late Cretaceous. The narrator explains that a massive comet is about to arrive to mark the end of dinosaurs, before taking us back to the Late Jurassic, circa 150 million years ago. From the announced end of the dinosaurs, this time travel serves the purpose of introducing us the biggest creatures to