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  • Dinosaur | Definition, Types, History, Names, Facts | Britannica
    Dinosaur, the common name given to a group of reptiles, often very large, that first appeared roughly 245 million years ago and thrived worldwide for nearly 180 million years Most died out by the end of the Cretaceous Period
  • Dinosaur - Extinction, Fossils, Evolution | Britannica
    Dinosaur - Extinction, Fossils, Evolution: Dinosaurs lived in many kinds of terrestrial environments, and although some remains, such as footprints, indicate where dinosaurs actually lived, their bones tell us only where they died
  • Dinosaur - Evolution, Classification, Extinction | Britannica
    Dinosaur - Evolution, Classification, Extinction: After dinosaurs were recognized as a new type of fossil animal, popular fascination with them reached a peak in the 1850s with the first attempts to reconstruct Iguanodon, Megalosaurus, and Hylaeosaurus
  • dinosaur - Kids | Britannica Kids | Homework Help
    For more than 150 million years, many large and scary creatures walked on land They were the dinosaurs These lizardlike reptiles got the name dinosaur from Greek words that mean “terrible lizard ” The last dinosaurs became extinct, or died out, about 65 5 million years ago Fossils of dinosaurs were first discovered in the early 1800s
  • dinosaur summary - Encyclopedia Britannica
    dinosaur, Any of the extinct reptiles that were the dominant land animals during most of the Mesozoic Era (251–65 5 million years ago) The various species appeared at different times—with the first form likely appearing some 245 million years ago—and not all overlapped
  • Dinosaur - Extinction Causes, Evidence, Theory | Britannica
    Dinosaur - Extinction Causes, Evidence, Theory: The mass extinction of dinosaurs 66 million years ago remains a misconception; the fossil record shows that dinosaurs were already in decline during the late Cretaceous
  • dinosaurs at a glance - Kids | Britannica Kids | Homework Help
    Dinosaurs were lizardlike reptiles that lived on Earth for more than 150 million years The word dinosaur means “terrible lizard ” Remains or traces of dinosaurs were first…
  • Dinosaur - Theropods, Extinction, Fossils | Britannica
    Dinosaur - Theropods, Extinction, Fossils: Theropoda includes all the known carnivorous dinosaurs and birds They have carnivorous dentitions, large, recurved claws on the fingers, and epipophyses on the neck vertebrae Ceratosauria includes Ceratosaurus and all theropods more closely related to it than birds
  • Name That Dinosaur! Quiz | Britannica
    Take this Science quiz at Encyclopaedia Britannica to test your knowledge of dinosaurs





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