Dinosaur | Definition, Types, History, Names, & Facts | Britannica
Nov 11, 2025 · 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
Oct 31, 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 in the …
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 …
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 …
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 …
Name That Dinosaur! Quiz | Britannica
Take this Science quiz at Encyclopaedia Britannica to test your knowledge of dinosaurs.