Scientists still debate the purpose of this dinosaur's iconic horns and spiky head plate. Find out what we’ve learned about how Triceratops lived and why it went extinct. Triceratops’ enormous ...

Discover facts, figures and images for more than 300 dinosaurs ... Uncover what dinosaurs have been found in your country and how big they were. Learn the meaning of dinosaur names and how to say them ...

Ornithischians were one of the two major groups of dinosaurs and included such familiar species as the armor-plated Stegosaurus and Ankylosaurus and the three-horned Triceratops. Lesothosaurus was ...