Cretaceous. The Cretaceous ended with a large mass extinction, the Cretaceous - Paleogene extinction event, in which many groups, including non-avian dinosaurs, pterosaurs and large marine reptiles died out. Edmontosaurus ([ɛdˌmɒntəˈsɔːrəs]) is a genus of hadrosaurid (duck-billed) dinosaur. Tyrannosaurus ([tᵻˌrænəˈsɔːrəs, _ taɪ -], meaning "tyrant lizard", from the Ancient Greek tyrannos, "tyrant", and sauros, "lizard") is a genus of coelurosaurian theropod dinosaur.
In the Cretaceous non-avian dinosaurs died out all in one morning.
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In the Cretaceous non-avian dinosaurs died out all in one morning.
Create a short claim.
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In the Cretaceous non-avian dinosaurs died out all in one morning.
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