Acrocanthosaurus
Acrocanthosaurus was a sauropod of spectacular proportions. In some ways it looked like many other meat-eating dinosaurs, but it had a sail along its back. See pictures and learn more about this dinosaur.
See more »early cretaceous dinosaurs library
The Early Cretaceous Period was a time in which the Earth was undergoing a process of change. Learn more about some common and not so common Early Cretaceous dinosaurs, including the Iguanodon, Muttaburrasaurus, and Sauropelta.
Featured Article: Deinonychus
Though Deinonychus was small compared to Tyrannosaurus or Allosaurus, it was an agile theropod capable of deadly attacks. Nearly complete skeletons of this fierce dinosaur were discovered in southern Montana in 1964. Learn more. See more »
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Carnotaurus
Carnotaurus (its name means "meat bull") is known from a single, nearly complete skeleton that had skin impressions over much of the skull and body. Read more about this South American dinosaur's unusual features.
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Early Cretaceous Period
The Early Cretaceous Period was a time in which the Earth was undergoing a process of change. Changes in the land masses had a large effect on the plants and animals during this time. What kind of dinosaurs lived during this Period?
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Iguanodon
This dinosaur got its name, "iguana tooth," because its tooth looked like those of an iguana. It was a large ornithopod and walked on its stocky back legs. Discover if it was a plant or meat eater.
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Muttaburrasaurus
The "reptile from Muttaburra," Muttaburrasaurus is one of the recently discovered ornithopods from Australia, and it is one of the best known from there. Learn more about this plant-eating dinosaur and its relatives.
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Ouranosaurus
Discovered in 1966 in Niger, Africa, this new dinosaur was first named and studied in 1976. Its name means "brave reptile." See why it is one of the most puzzling large ornithopods of the Cretaceous.
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Sauropelta
Sauropelta was different from many ankylosaurs because it had two types of teeth. They are also well-known as having the most accurate skeletal reconstructions and life restorations of any known ankylosaur. Read more.
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Tenontosaurus
Tenontosaurus was a medium-size ornithopod dinosaur from Montana and Wyoming. Skeletons range in size from very small juveniles to almost 22-foot-long adults. Learn more about how this dinosaur lived and what it ate.
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Wuerhosaurus
The best-documented Early Cretaceous stegosaur is Wuerhosaurus. Skeletons were found in the Tugulo Formations near the northwestern part of the Junggar Basin, China. Learn more about his historic dinosaur.
See more »Baryonyx
Baryonyx was found in 1983 by an amateur fossil collector in Surrey, England. He discovered a large claw that was nearly a foot long, and the animal was named for this fossil, which means "heavy claw." Learn more.
See more »Deinonychus
Though Deinonychus was small compared to Tyrannosaurus or Allosaurus, it was an agile theropod capable of deadly attacks. Nearly complete skeletons of this fierce dinosaur were discovered in southern Montana in 1964. Learn more.
See more »Hypsiolphodon
The first remains of Hypsilophodon were discovered in 1849 from Early Cretaceous rocks on the Isle of Wight, England. They were long-legged, swift and agile. Scientists even thought they might have lived in trees. See why.
See more »Psittacosaurus
Discovered in Outer Mongolia in 1922, Psittacosaurus was one of the smallest and most primitive members of the Ceratopsia. Two of the specimens were juveniles, smaller than a robin. Learn about these tiny dinosaurs.
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