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 …

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 ...

Get to know the different types of these reptiles that dominated the Earth before mammals here. Classification based on alphabets: Since there is no way to confirm and classify all the …

Nov 11, 2025 · 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.

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

Resources to help students understand everything from basic dinosaur biology and evolution, to the tools and methods of modern paleontology. Paleontologist Mark Norell answers kids’ …

May 2, 2024 · Explore an A-to-Z list of over 700 dinosaurs that lived during the Triassic, Jurassic, and Cretaceous periods. How many dinosaur names do you know?

Check out a random dinosaur, search for one below, or look at our interactive globe of ancient Earth! Whether you are a kid, student, or teacher, you'll find a rich set of dinosaur names, …

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

Oct 27, 2009 · Scientists first began studying dinosaurs during the 1820s, when they discovered the bones of a large land reptile they dubbed a Megalosaurus (“big lizard”) buried in the …