Dinosaurs are a diverse group of an

Dinosaurs are a diverse group of animals of the clade Dinosauria that first appeared during the Triassic period. Although the exact origin and timing of the evolution of dinosaurs is the subject of active research,[1] the current scientific consensus places their origin between 231 and 243 million years ago.[2] They became the dominant terrestrial vertebrates after the Triassic–Jurassic extinction event 201 million years ago. Their dominance continued through the Jurassic and Cretaceous periods and ended when the Cretaceous-Paleogene extinction event led to the extinction of most dinosaur groups 66 million years ago.

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Dinosaurs are a DIVERSE group of animals of the clade Dinosauria khi có first appeared, the Triassic period. Although the exact origin and timing of the evolution of dinosaurs is the subject of active research, [1] the current scientific consensus places the between 231 and ask for their origin 243 million years ago. [2] They became the dominant terrestrial vertebrates Triassic-Jurassic sau extinction event 201 million years ago. Their dominance continued through the Jurassic and Cretaceous periods and the Cretaceous-Paleogene khi ended extinction event led to the extinction of most dinosaur groups 66 million years ago.