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24 de dez. de 2023 · Dinosaurs are archosaurs, a larger group of reptiles that first appeared about 251 million years ago, near the start of the Triassic Period. Some other non-dinosaur reptiles are also archosaurs, including pterosaurs (the now-extinct flying reptiles) and modern crocodiles and their ancestors. These and many other types of ancient reptiles are ...
Dinosaurs. Dinosaurs are a group of reptiles that first appeared about 245 million years ago. They dominated the planet until an extinction event wiped out a large swath of life on Earth about 66 million years ago. But now we know that the Age of Dinosaurs never ended. Instead, a group of dinosaurs gave rise to a new, small airborne form: birds.
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Camptosaurus is a relatively small and rare example of the Late Jurassic, North American dinosaurs. Diplodocus longus. In Diplodocus, the slender neck and whip-like tail are extremely long, and the skull is slender and low, almost streamlined, even though the snout is broad and blunt. Mamenchisaurus hochuanensis.
3 de dez. de 2021 · Explainer: The age of dinosaurs. Known as the Mesozoic, much happened over its more than 180 million years — just ask the dinos. Two T. rexes face off over a triceratops corpse. During the three periods of the Age of Dinosaurs, geologic events played a major role in the environmental conditions that led to dinosaur dominance.
27 de out. de 2009 · Lia Toby/Getty Images. The prehistoric reptiles known as dinosaurs arose during the Middle to Late Triassic Period of the Mesozoic Era, some 230 million years ago. They were members of a subclass ...
Os dinossauros foram animais que dominaram o ambiente terrestre durante a Era Mesozoica. Eles surgiram, mais precisamente, no período Triássico, se extinguindo no final do período Cretáceo. Os ...
