Portal:Dinosaurs

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The Dinosaur Portal

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Introduction

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Dinosaurs are animals that dominated terrestrial environments for more than 160 million years, first appearing approximately 230 million years ago. They were extremely varied, abundant and have been found preserved on all seven modern continents. At the end of the Cretaceous period, approximately 66 million years ago, a catastrophic extinction event ended the dinosaurs' dominance on land. However, since birds are theropods the clade dinosauria still survives in great diversity and abundance. The term "dinosaur" is sometimes used mistakenly to describe other prehistoric animals, such as the synapsid Dimetrodon, or reptiles like pterosaurs, ichthyosaurs, plesiosaurs and mosasaurs. Since the first dinosaur fossils were recognized in the nineteenth century, mounted dinosaur skeletons have become major attractions at museums around the world and have amassed a large fan base among children and adults alike. They have been featured in best-selling books and films such as Jurassic Park, and new discoveries are regularly covered by the media.
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T. rex skull.
Tyrannosaurus (meaning 'tyrant lizard') is a genus of tyrannosaurid theropod dinosaur. The species Tyrannosaurus rex, commonly abbreviated to T. rex, is one of the dinosaurs most often featured in popular culture around the world. It hails from what is now western North America.

Like other tyrannosaurids, Tyrannosaurus was a bipedal carnivore with a massive skull balanced by a long, heavy tail. Relative to the large and powerful hindlimbs, Tyrannosaurus forelimbs were small and retained only two digits. Although other theropods rivaled or exceeded T. rex in size, it was the largest known tyrannosaurid and one of the largest known land predators, measuring over 13 metres (43 ft) in length and up to 7.5 tons in weight.

Fossils of some T. rex have been found in North American rock formations dating to the very end of the Cretaceous Period (late Maastrichtian stage, 65 million years ago); it was among the last dinosaurs to exist prior to the Cretaceous–Paleogene extinction event. More than 30 specimens of T. rex have now been identified, some nearly complete, which has allowed significant research into many aspects of its biology, including its life history and biomechanics. The feeding habits and potential speed of T. rex remain controversial. (see more...)

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Tyrannosaurus rex.

Tyrannosaurus rex skull at Palais de la Découverte in Paris.

Photo credit: Commons:User:David Monniaux

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Topics

Dinosaur-related topics - Dinosaur - Cretaceous–Paleogene extinction event - Dinosaur-bird connection - Dinosaur classification - Evolution of dinosaurs - Feathered dinosaurs - List of dinosaurs - Paleontology - Physiology of dinosaurs
Locations - List of dinosaur-bearing rock formations - List of fossil sites - Como Bluff - Coon Creek Formation - Dinosaur Cove - Dinosaur National Monument - Dinosaur Park Formation - Dinosaur State Park and Arboretum - Glen Rose Formation - Hell Creek Formation - Lance Formation - Morrison Formation - Red Gulch Dinosaur Tracksite - Two Medicine Formation
Paleontologists - Mary Anning - Robert T. Bakker - Barnum Brown - William Buckland - Edward Drinker Cope - Jack Horner - Gideon Mantell - Othniel Charles Marsh - John Ostrom - Dong Zhiming
History - List of years in paleontology - Bone Wars - Dinosaur Renaissance
Popular culture - List of dinosaur parks - Cultural depictions of dinosaurs - Jurassic Park - Jurassic Park (film) - Raptor Red
Alternative Theories - Creationist perspectives on dinosaurs - Living dinosaurs
Featured dinosaur articles - Acrocanthosaurus - Albertosaurus - Allosaurus - Archaeopteryx - Bone Sharps, Cowboys, and Thunder Lizards - Bone Wars - Chicxulub crater - Compsognathus - Cretaceous–Paleogene extinction event - Daspletosaurus - Deinonychus - Dinosaur - Diplodocus - Edmontosaurus - Edward Drinker Cope - Gorgosaurus - Herrerasaurus - Iguanodon - Lambeosaurus - List of dinosaurs - Majungasaurus - Massospondylus - Parasaurolophus - Plateosaurus - Psittacosaurus - Stegosaurus - Styracosaurus - Tarbosaurus - Thescelosaurus - Triceratops - Tyrannosaurus - Velociraptor
Good dinosaur articles - Abelisauridae - Alioramus - Amphicoelias - Ankylosaurus - "Archaeoraptor" - Balaur - Carnotaurus - Ceratopsia - Coelurus - Cultural depictions of dinosaurs - Dromaeosauridae - Gryposaurus - Heterodontosauridae - Hypacrosaurus - Hypsibema missouriensis - Kritosaurus - Othnielosaurus - Pachycephalosaurus - Prosaurolophus - Rajasaurus - Saurolophus - Sauropelta - Scelidosaurus - Sinosauropteryx - Species of Allosaurus - Spinosaurus - Tyrannosauridae - Tyrannosauroidea - Vulcanodon

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Current Dinosaur FACs - Dromaeosauroides - Nigersaurus

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