It isn't hard to imagine the world full of dinosaurs, even though these extinct animals haven't walked the earth for millions of years. Learn all about dinosaurs, including early dinosaur discoveries, dinosaur fossils, and dinosaur extinction.
  • About Dinosaurs
  • Early Triassic & Jurassic Dinosaurs
  • Middle & Late Jurassic Dinosaurs
  • Early Cretaceous Dinosaurs
  • Late Cretaceous Dinosaurs


Discovered during an expedition by the American Museum of Natural History, Saurornithoides is an example of a birdlike dinosaur. It looked much like a bird. It was found close to where two other birdlike dinosaurs (Velociraptor and Oviraptor) were also discovered.

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Often called the terror of the Early Jurassic, the Dilophosaurus was a fast and agile dinosaur with extremely powerful neck and jaw muscles. It also had two crests on its head that may have been used for displaying the animal's social position.


Scelidosaurus was discovered in the 19th century. At the time, it was one of the most complete dinosaur skeletons ever found. It was a heavily built plant eating dinosaur that grew to around 13 feet in length.

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