- Dinosaur - Wikipedia
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
- List of dinosaur genera - Wikipedia
This list of dinosaurs is a comprehensive listing of all genera that have ever been considered to be non- avialan dinosaurs, but also includes some dinosaurs of disputed status as non-avian, as well as purely vernacular terms
- Dinosaur - Simple English Wikipedia, the free encyclopedia
Dinosaurs evolved in the Upper Triassic, about 230 million years ago (mya) [3] The earliest date of a fossil is that of Eoraptor and Herrerasaurus from Argentina, and Saturnalia from Brazil, 237 to 228 mya [4] By the early Jurassic they were the top land vertebrates, and dominated most environments on land
- Portal:Dinosaurs - Wikipedia
Dinosaurs are a diverse group of reptiles 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
- Tyrannosaurus - Wikipedia
Like many bipedal dinosaurs, T rex was historically depicted as a 'living tripod', with the body at 45 degrees or less from the vertical and the tail dragging along the ground, similar to a kangaroo
- Dinosaur | Definition, Types, History, Names, Facts | Britannica
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
- Dinosaur classification - Wikipedia
Though extinct dinosaurs are often described as "non-avian" to distinguish them from birds, many groups of theropods have specifically been created to unite extinct taxa with modern birds and the boundary between dinosaurs and birds is arbitrary
- List of dinosaurs - Simple English Wikipedia, the free encyclopedia
List of dinosaurs The following is a list of dinosaurs Some of them, such as Archaeopteryx, are considered to be birds Some doubtful Mesozoic birds are included in this list
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