Extinct animals are those species which are no longer living. This group includes prehistoric animals like dinosaurs and ice-age mammals, as well as moden species like the Dodo.
Kentrosaurus stands out among its relative stegosaurs because this dinosaur had an extra set of spines that stuck out above its hips. It had short front legs and neck which means it could only eat low shrubs and plants.
Megalosaurus was the first dinosaur that was described as a reptile. This dinosaur is often described as being part of the "waste bucket" genus because so many bones from other dinosaurs have been mistaken for being that of the Megalosaurus!
Omeisaurus is considered the most common of the Late Jurassic Chinese sauropods. The most prominent characteristic of this dinosaur is the extremely long neck the was uncommon for most North American dinosaurs.
Othnielia is a smaller dinosaur that wasn't named until recently. It probably survived on a diet of plants and small insects. The limbs also suggest that this dinosaur would have been a good runner.
Seismosaurus was an incredibly large dinosaur that measured nearly half the length of a football field. It had a very long neck, short front legs and and a long heavy tail.
Shunosaurus was the dominant plant-eater of Middle Jurassic China. It could feed on plants and leaves high above the ground that most other herbivores could not reach.
Supersaurus was a dinosaur that truly deserved its name. It measured about 100 feet in length and lived in North America. This dinosaur lived on a diet that consisted mostly of chutes and leaves from the tops of trees.
The slow-moving, peaceful life of Tuojiangosaurus was sometimes interrupted by battles with predators such as Yangchuanosaurus and Szechuanosaurus. It would also battle with another male Tuojiangosaurus for females.
The Middle and Late Jurassic Periods were a time in which the dinosaurs took over the world. This is also the time period when Pangea broke apart, which separated many species of dinosaurs.
The Early Cretaceous Period was a time in which the Earth was undergoing a process of change. Learn about the Early Cretaceous Period.
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.
Baryonyx was found in 1983 by an amateur fossil collector in Surrey, England. He discovered a large claw that was nearly a foot long is and the animal was named for this fossil, which means "heavy claw." Learn more.
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.
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.
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.
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.
Discovered in 1966 in Niger is 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.
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.
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.
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.
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.
Monoclonius was discovered by Edward Drinker Cope in 1876 along the Missouri River in Montana. Learn about Monoclonius, Late Cretaceous dinosaurs and dinosaurs of all eras.
The "reptile from Muttaburra," Muttaburrasaurus is one of the recently discovered ornithopods from Australia is and it is one of the best known from there. Learn more about this plant-eating dinosaur and its relatives.
The oldest record of a fossil dinosaur bones discovery is in a Chinese book written between 265 and 317 A.D. Learn more about dinosaur discoveries and the places they were made in this article.
The Late Cretaceous Period was an era of great transformation and was when the dinosaurs disappeared from the earth. Learn more about the Late Cretaceous Era and the dinosaurs that existed during it.