Dinosaurs are a diverse group of warmblooded reptiles [note 1] of the clade Dinosauria. They existed through most of the Mesozoic era, first appearing early in the Triassic period.

May 1, 2026 · 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.

Mar 21, 2026 · List of dinosaurs, with facts & information. Dinosaur names with pictures, a complete online reference. Learn about famous & lesser-known Mesozoic species.

A-Z of dinosaurs full of facts and pictures. Search by name, type of dinosaur, or when and where they lived. Find out key information such as size, diet and how to pronounce names.

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 …

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.

Jun 29, 2018 · 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 …

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 English …

Explore the incredible world of dinosaurs through fascinating facts, amazing art, and the latest science. Ali and Sean travel back 80 million years to check out Tylosaurus, a prehistoric reptile...