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Though commonly grouped with dinosaurs in children’s books and other media, the Dimetrodon was actually a synapsid, not a dinosaur. Synapsids are a...

Iguanodon was the first plant-eating dinosaur ever discovered, and the second dinosaur to be named. A sharp spike on its thumb provided a useful de...

Carcharodontosaurus was one of the largest meat-eating dinosaurs of all time. This terrifying theropod was named after the great white shark, Carch...

Masiakasaurus is a small bizarre meat-eating dinosaur that was named in 2001. It surprised paleontologists because of its oddly shaped jaws and pro...

Sauropelta was a medium-sized armored dinosaur that lived in North America during the Early Cretaceous, about 108 million years ago. This peaceful ...

Dimorphodon was a medium-sized (wingspan of about 4.5 feet) pterosaur that lived in the Early Jurassic Period (about 200 million years ago) in what...

Named for the La Amarga geographic formation in Argentina, Amargasaurus is known from an almost entirely complete skeleton that showcases its most ...

Coelophysis was one of the first agile meat-eating dinosaurs. This relatively small theropod scurried around what is now New Mexico during the Tria...

  Tylosaurus was a ferocious marine lizard that powered itself through the water with sweeping motions of its long body and fish-like tail. At a ma...

The magnificent Quetzalcoatlus was the size of a small aircraft and one of the largest flying animals ever. This massive, but delicately built, car...

Microraptor was a small, feathered dinosaur that occupied the forested wetlands of early Cretaceous China. About the size of a raven, it had large ...

Kronosaurus belongs to a marine reptile group called pliosaurs. This toothy predator cruised the oceans during the early Cretaceous, about 120 mill...

Diplodocus is one of the most famous long-necked dinosaurs. At over 88 ft long from the tip of its snout to the end of its whip-like tail, Diplodoc...

Giganotosaurus is the largest carnivorous dinosaur from South America. At an estimated 41 ft long, this massive dinosaur challenges even Tyrannosau...

The discovery of Yutyrannus changed how paleontologists thought about large tyrannosaurs. Feathers in this carnivorous relative of T. rex suggeste...

Ammonites were a group of marine molluscs related to modern octopus, squids and cuttlefish that first appeared in the Devonian Period (about 400 mi...

Megalodon was a huge shark (almost 60 feet in length) that lived during the Cenozoic Era (23-2.6 million years ago). It probably looked like a larg...

Deinocheirus is regarded as one of the most peculiar species of dinosaur. The true identity of this bizarre creature was a mystery for over four de...

Dracorex hogwartsia may have looked like a fearsome dragon, but it was actually a gentle plant-eating dinosaur. This spiny bone-headed dinosaur was...

The horned Ceratosaurus is one of the most distinctive meat-eating dinosaurs. This medium-sized predator lived in North America and Europe during t...

Suchomimus was a theropod dinosaur that lived in the Lower Cretaceous (about 120 million years ago) in what is now Niger, Africa. ‘Suchomimus’ lit...

Monolophosaurus was a medium sized theropod dinosaur (about 16 feet long) that lived during the Middle Jurassic Period (about 165 million years ago...

Acrocanthosaurus was a bipedal carnivorous dinosaur that lived in what is now North America during the Early Cretaceous period (115-110 million yea...

Elasmosaurus was a large marine reptile that lived during the Late Cretaceous (about 80 million years ago) in a shallow sea that once covered what ...