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  1. Dinosaurs 101. Anthropology, Archaeology, Geography, Social Studies. Scientists estimate over a thousand dinosaur species once roamed Earth. Learn which ones were the largest and the smallest, what dinosaurs ate and how they behaved, as well as surprising facts about their extinction.

  2. en.wikipedia.org › wiki › DinosaurDinosaur - Wikipedia

    Dinosaurs were the dominant terrestrial vertebrates of the Mesozoic Era, especially the Jurassic and Cretaceous periods.

  3. Jul 14, 2024 · Dinosaurs are a diverse group of reptiles that were the dominant terrestrial life form on Earth during the Mesozoic Era, about 245 million years ago. Dinosaurs went into decline near the end of the Cretaceous Period, about 66 million years ago.

  4. Jun 29, 2018 · Over a thousand dinosaur species once roamed the Earth. Learn which ones were the largest and the smallest, what dinosaurs ate and how they behaved, as well as surprising facts about their ...

  5. Jun 6, 2024 · Complete guide to dinosaurs, with list of dinosaurs from each period. Dinosaur evolution, extinction, types, plus interesting facts.

  6. Oct 27, 2009 · 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 of reptiles called...

  7. 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.

  8. Dinosaurs are a group of reptiles that dominated the land for over 140 million years (more than 160 million years in some parts of the world). They evolved diverse shapes and sizes, from the fearsome giant Spinosaurus to the chicken-sized Microraptor, and were able to survive in a variety of ecosystems.

  9. Jul 31, 2019 · Learn about the mass extinction event 66 million years ago and the evidence for what ended the age of the dinosaurs. Abundant fossil bones, teeth, trackways, and other hard evidence have revealed...

  10. Dinosaur, the common name given to a group of reptiles, often very large, that first appeared roughly 245 million years ago (near the beginning of the Middle Triassic Epoch) and thrived worldwide for nearly 180 million years.

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