Dinosaur | Definition, Types, History, Names, & Facts | Britannica
2 days ago · Dinosaur, the common name given to a group of reptiles, often very large, that first appeared roughly 245 million years ago and thrived worldwide for nearly 180 million years. …
Tyrannosaurus rex | Description, Dinosaur, & Facts | Britannica
Dec 12, 2025 · Tyrannosaurus rex, species of large predatory theropod dinosaurs that lived during the end of the Cretaceous Period (about 66 million years ago) known from fossils found …
Titanosaurs: 8 of the World’s Biggest Dinosaurs | Britannica
This Encyclopedia Britannica Animals list features 8 titanosaurs, some of the biggest dinosaurs and biggest land animals that ever lived.
Theropod | Carnivorous, Bipedal Dinosaurs | Britannica
Oct 24, 2025 · Theropod, any member of the dinosaur subgroup Theropoda, which includes all the flesh-eating dinosaurs. Theropods were the most diverse group of saurischian (“lizard …
Sue | Fossil, History, & Facts | Britannica
Oct 24, 2025 · Sue, nickname for one of the most complete and best-preserved skeletons of Tyrannosaurus rex. The fossil was dated to approximately 67 million years ago. Sue is 12.8 …
Cristina Peri Rossi | Biography, Books, & Facts | Britannica
Nov 8, 2025 · La tarde del dinosaurio (1976; “The Afternoon of the Dinosaur”) is a volume of stories with a prologue by Cortázar. Witty El museo de los esfuerzos inútiles (1983; The …
Spinosaurus | Habitat, Weight, Diet, & Facts | Britannica
Nov 6, 2025 · Spinosaurus, genus of theropod dinosaurs in the family Spinosauridae, known from incomplete North African fossils that date to Cenomanian times (roughly 100 to 94 million …
Quetzalcoatlus | Size, Wingspan, Flight, & Facts | Britannica
Quetzalcoatlus is a genus made up of two species of giant pterosaurs, classified in the family Azhdarchidae, that lived during the Maastrichtian Age (72.1 million to 66 million years ago) of …
Name That Dinosaur! Quiz | Britannica
Take this Science quiz at Encyclopaedia Britannica to test your knowledge of dinosaurs.