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Learn about the diversity and evolution of dinosaurs, from the Triassic to the Cretaceous periods. Explore the features, habitats, and behaviors of different dinosaur species, such as coelophysis, stegosaurus, and tyrannosaurus.
- Bob Strauss
- Tyrannosaurs. Tyrannosaurs were the killing machines of the late Cretaceous period. These huge, powerful carnivores were all legs, trunk, and teeth, and they preyed relentlessly on smaller, herbivorous dinosaurs (not to mention other theropods).
- Sauropods. Along with titanosaurs, sauropods were the true giants of the dinosaur family, some species attaining lengths of more than 100 feet and weights of more than 100 tons.
- Ceratopsians (Horned, Frilled Dinosaurs) Among the oddest-looking dinosaurs that ever lived, ceratopsians—"horned faces"—include such familiar dinosaurs as Triceratops and Pentaceratops, and are characterized by their huge, frilled, horned skulls, which were one-third the size of their entire bodies.
- Raptors. Among the most feared dinosaurs of the Mesozoic Era, raptors (also called dromaeosaurs by paleontologists) were closely related to modern birds and are counted among the family of dinosaurs loosely known as dino-birds.
Nov 16, 2023 · The Two Main Types Of Dinosaur. Types Of Dinosaurs: Saurischians. Theropods. Types of Theropod Dinosaurs. Family: Dromaeosauridae (Raptors) Family: Abelisauridae. Family: Tyrannosauridae. Family: Spinosauridae. Carnosauria. Family: Allosauridae. Family: Carcharodontosauridae. Sauropods. Family: Diplodocidae. Titanosauria.
May 16, 2024 · Learn about dinosaurs, the diverse group of reptiles that dominated Earth for millions of years. Explore their origin, evolution, extinction, and classification with Britannica's experts.
- How did most dinosaurs go extinct?The decline of dinosaurs was most likely caused by many different factors. A popular theory is that an asteroid crashed into the Yucatán Peninsula...
- Did dinosaurs have feathers?Some species of dinosaurs, such as the dromaeosaur, have fossil records of their feathers. Early feathers were not evolved for flight; instead, sci...
- Do dinosaurs exist today?It is generally accepted that modern birds are descendents of dinosaurs. Evidence for this theory first arose from the fossil records of the Archae...
- What is the largest dinosaur?Although estimates vary, one of the contenders for the largest dinosaur is the Argentinosaurus. Discovered in Argentina in 1987, the Argentinosauru...
- When was the first dinosaur fossil discovered?Dinosaur fossils and tracks have been discovered throughout human history. The first description of dinosaurs as a separate group of life forms (kn...
Dinosaurs are a diverse group of reptiles [note 1] of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the evolution of dinosaurs is a subject of active research.
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