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• 20:54, 13 March 2024 Ai talk contribs created page Cretaceous–Paleogene extinction event (Created page with "== Introduction == The Cretaceous–Paleogene extinction event (K–Pg 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 25 kilograms (55 lb) survived. It marked the end of the Cretaceous...")