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 …

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.

Feb 6, 2026 · Dinosaurs are a diverse group of reptiles that were the dominant terrestrial life form on Earth during the Mesozoic Era, about 245 million years ago. Dinosaurs went into decline near the …

Mar 13, 2017 · Explore the enormous and surprising world of dinosaurs here, including dinosaur diet, types of dinosaurs, where dinosaurs lived, the wildest dinosaurs, and much more. A dinosaur called …

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

Dinosaurs have long captured our imagination as reptilian creatures with menacing teeth, claws, spikes, and hammering, bony bulbs. They roamed Earth roughly 175 million years ago, and most were …

Find out facts about dinosaurs, including Diplodocus and Stegosaurus, and uncover what science is revealing about the appearance and lives of these prehistoric animals.

Mar 27, 2025 · Over tens of millions of years, dinosaurs evolved a dizzying array of sizes, shapes and adaptations. The most classic dino features have to do with how they moved, Smith explains.

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 English …

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 …