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  1. Dinosaur - Wikipedia

    Birds are avian dinosaurs, and phylogenetic taxonomy includes over 11,000 extant species in the group Dinosauria. Dinosaurs are a diverse group of reptiles [note 1] of the clade Dinosauria. …

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

    2 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 …

  4. 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 …

  5. 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 …

  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, …

  7. 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 …

  8. Four amazing dinosaur discoveries that stunned researchers in 2025

    Dec 28, 2025 · A T. Rex missing link, a spike-fossil and a raptor still eating its dinner are just a few of the interesting dinosaur discoveries in 2025.

  9. Dinosaurs (U.S. National Park Service)

    Oct 17, 2019 · Discover what scientists study and know about dinosaurs that went extinct 65 million years ago.

  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.