Dinosaur ColumnDinosaur TypesDinosaur CharacteristicsDinosaur FossilsEra Pterosaurs: The Flying Reptiles of the Dinosaur Age Marine Reptiles of the Dinosaur Age The Bird-Footed Dinosaurs: Ornithopods—A Worldwide Success Story of Astonishing Diversity and Survival. The Moving Fortresses of the Dinosaur World: Thyreophorans—An Evolutionary History Protected by Armor and Spikes. The Dinosaurs That Decorated Their Heads: Marginocephalians—Uncovering the Evolutionary Secrets of Horns and Frills. What Are Ornithischians? Unveiling Key Species and Surprising Truths About One of the Three Major Dinosaur Groups. The Giants of the Dinosaur World: Sauropodomorphs—Unveiling the Evolutionary Secret That Produced Earth’s Largest Creatures. The Main Architects of Evolution: Theropods—The Most Successful Hunters in History and the Lineage That Evolved into Birds. The Complete Picture of Dinosaur Classification: Saurischia vs. Ornithischia, Defining Their Diverse Evolution.