• dinosaurs
  • In these publications, he argued strenuously that dinosaurs were warm-blooded and active animals, capable of sustained periods of high activity. (wikipedia.org)
  • These debates sparked interest in new methods for ascertaining the palaeobiology of extinct animals, such as bone histology, which have been successfully applied to determining the growth-rates of many dinosaurs. (wikipedia.org)
  • The fossil record indicates that birds are modern feathered dinosaurs, having evolved from earlier theropods during the late Jurassic Period. (wikipedia.org)
  • Dinosaurs are a varied group of animals from taxonomic, morphological and ecological standpoints. (wikipedia.org)
  • Using fossil evidence, paleontologists have identified over 500 distinct genera and more than 1,000 different species of non-avian dinosaurs. (wikipedia.org)
  • Dinosaurs are represented on every continent by both extant species (birds) and fossil remains. (wikipedia.org)
  • Most research conducted since the 1970s, however, has indicated that all dinosaurs were active animals with elevated metabolisms and numerous adaptations for social interaction. (wikipedia.org)
  • While the dinosaurs' modern-day surviving avian lineage (birds) are generally small due to the constraints of flight, many prehistoric dinosaurs (non-avian and avian) were large-bodied-the largest sauropod dinosaurs are estimated to have reached lengths of 39.7 meters (130 feet) and heights of 18 meters (59 feet) and were the largest land animals of all time. (wikipedia.org)
  • Both definitions result in the same set of animals being defined as dinosaurs: "Dinosauria = Ornithischia + Saurischia", encompassing ankylosaurians (armored herbivorous quadrupeds), stegosaurians (plated herbivorous quadrupeds), ceratopsians (herbivorous quadrupeds with horns and frills), ornithopods (bipedal or quadrupedal herbivores including "duck-bills"), theropods (mostly bipedal carnivores and birds), and sauropodomorphs (mostly large herbivorous quadrupeds with long necks and tails). (wikipedia.org)
  • According to the new classification, the original dinosaurs, arising 200 million years ago, were small, two-footed omnivorous animals with large grasping hands. (wikipedia.org)
  • The process leading up to the Dinosauromorpha and the first true dinosaurs can be followed through fossils of the early Archosaurs such as the Proterosuchidae, Erythrosuchidae and Euparkeria which have fossils dating back to 250 Ma, through mid-Triassic archosaurs such as Ticinosuchus 232-236 Ma. (wikipedia.org)
  • Sauropod fossils are found from the times of the earliest dinosaurs right up to the Cretaceous-Paleogene extinction event, from 227 to 66 Ma. (wikipedia.org)
  • largest
  • The pterosaurs are famous for flying through the Mesozoic skies on leathery wings and reaching the largest sizes of any flying animal that ever existed. (wikipedia.org)