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  2. Jun 29, 2018 · National Geographic. 23.1M subscribers. 7.5M views 5 years ago. ...more. Over a thousand dinosaur species once roamed the Earth. Learn which ones were the largest and the smallest, what...

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

    Dinosaurs are a diverse group of reptiles [note 1] of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the evolution of dinosaurs is a subject of active research.

  4. Dinosaurs. 817K subscribers. Subscribed. 649K. 273M views 10 years ago. Join Dinosaurs for incredible kid-friendly videos. Enter the prehistoric world when dinosaurs ruled the Earth. See them...

  5. 4 days ago · 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. Many lines of evidence show that one lineage evolved into birds about 155 million years ago.

  6. Quick facts about dinosaurs for kids and grown-ups! Find out what dinosaurs ate, how they may have behaved, what they may have looked like, and more.

  7. 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.

  8. Oct 27, 2009 · Pre-History. Dinosaurs. By: History.com Editors. Updated: June 29, 2023 | Original: October 27, 2009. copy page link. Print Page. Lia Toby/Getty Images. The prehistoric reptiles known as...

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