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Dinosaur
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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. They first appeared during the Triassic period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the evolution of dinosaurs is a subject of active research. They ...
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 ...
Learn about the different types of dinosaurs, their names, characteristics, and pictures on this website. Find out interesting facts about the biggest, smallest, and longest-necked dinosaurs, and how they became extinct.
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. Most died out by the end of the Cretaceous Period. Many lines of evidence show that one lineage evolved into birds about 155 million years ago.
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.
Learn everything about dinosaurs, from their definition and evolution to their extinction and modern descendants. Explore lists of dinosaurs by period, see pictures and info on your favorite dino, and discover more amazing facts on Active Wild.
150 million years ago, dinosaurs roamed here. Their fossils are still embedded in the rocks. Today, mountains, desert, and rivers flowing in canyons support a variety of life. Petroglyphs reveal the lives and connections of Indigenous people to this land. Homesteaders and outlaws found refuge here. Whether your passion is science, adventure, history, or scenery, Dinosaur offers much to explore.
Dinosaurs, the ruling reptiles of the Mesozoic Era, arose during the Triassic Period and include species related to birds and crocodiles.
Learn about different types of dinosaurs, their history, discoveries, size, diets, contemporaries, and much more.
Learn how dinosaurs are a specific group of reptiles that include birds and their ancestors. Find out how to distinguish dinosaurs from other ancient reptiles based on their hip and leg bones.