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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 exact origin and …

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

    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.

  3. 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 reptiles …

  4. Dinosaurs - Natural History Museum

    Get your fill of dinosaur facts and fun, and find out all about the reptiles that once dominated our planet. Ever since they were first identified in the 1800s, dinosaurs have sparked the imagination of kids and …

  5. 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 facts about …

  6. What is a dinosaur? - Science News Explores

    Mar 27, 2025 · The word “dinosaur” isn’t a catch-all term for just any scaly, prehistoric giant. “There’s kind of a misconception that any big extinct thing was a dinosaur,” Smith says. In fact, dinos are a …

  7. The Dinosauria - University of California Museum of Paleontology

    The Dinosauria Dinosaurs, one of the most successful groups of animals (in terms of longevity) that have ever lived, evolved into many diverse sizes and shapes, with many equally diverse modes of …

  8. 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 million years ago.

  9. 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 as surprising facts about their ...

  10. The Ultimate Dino Resource – Species, News, Facts, and Toys

    Explore various Dinosaur species, uncover fascinating dinosaur facts, stay updated with news, and discover the best dino toys, tv shows, featuring Dinosaurs.