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 ...

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 …

Nov 11, 2025 · 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 …

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.

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.

Oct 27, 2009 · Dinosaurs can reveal fascinating details of how life was 65 million years ago. But unearthing them can prove to be challenging.

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.

Jul 31, 2025 · The age of dinosaurs—also known as the Mesozoic Era—is divided into three periods: the Triassic, the Jurassic, and the Cretaceous. This stretch of time, from about 252 to 66 million years …