Triceratops skeleton Smithsonian National Museum of Natural History: Dinosaurs PaleobiologyNational Museum of Natural HistorySmithsonian Institution
Dinosaur InfoDinosaur Collections & ExhibitsInteractives
The first dinosaurs were small, meat-eating animals that first arose over 200 million years ago.  From such small beginnings evolved thousands of different species, including the largest animals ever to walk on Earth.  At the Smithsonian, some of the most important dinosaurs known to science stand in our exhibit halls, from the ferocious Allosarus to eighty-foot Diplodocus.  Learn more about our famous dinosaurs here.. A scientific illustrator's rendition of the Cretaceous landscape.  Illustration by Mary Parrish, Dept. of Paleobiology