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  1. Dinosaur - 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 …

  2. Dinosaurs 101 | National Geographic - YouTube

    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 ...

  3. Dinosaur | Definition, Types, History, Names, & Facts | Britannica

    3 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.

  4. Dinosaur Facts - American Museum of Natural History

    Delve into these fast facts about dinosaurs for kids of all ages. Discover why the Tyrannosaurus had sharp teeth, where the name “dinosaur” comes from, and more! Dinosaurs are a group of …

  5. What is a dinosaur? - Science News Explores

    Mar 27, 2025 · dinosaur: A term that means “terrible lizard”. These reptiles emerged around 243 million years ago. All descended from egg-laying reptiles known as archosaurs. Their …

  6. Dinosaurs – The Complete Guide, With Facts And Pictures

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

  7. Dinosaurs - National Geographic Society

    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 …

  8. The Dinosaurs | An Encyclopedia of Dinosaurs

    Mar 19, 2024 · Learn about different types of dinosaurs, their history, discoveries, size, diets, contemporaries, and much more.

  9. Dinos Alive Exhibit Seattle: An Immersive Experience

    With it, you’ll be able to look up any dinosaur you come across, and even purchase tickets. Younger scientists can also scan QR codes containing more information about each dino!

  10. What is a Dinosaur? - Natural History Museum

    Dinosaurs were a specialized group of land reptiles that lived during the Mesozoic Era, also called the "Age of Dinosaurs". The Mesozoic was the period of time between 252 million and 66 …