Dinosaur | Definition, Types, History, Names, & Facts | Britannica
2 天之前 · dinosaur, (clade Dinosauria), the common name given to a group of reptiles, often very large, that first appeared roughly 245 million years ago (near the beginning of the Middle Triassic Epoch) and thrived worldwide for nearly 180 million years.
Dinosaur - Evolution, Classification, Extinction | Britannica
2 天之前 · Dinosaur - Evolution, Classification, Extinction: After dinosaurs were recognized as a new type of fossil animal, popular fascination with them reached a peak in the 1850s with the first attempts to reconstruct Iguanodon, Megalosaurus, and Hylaeosaurus.
Dinosaur - Reptiles, Extinction, Fossils | Britannica
6 天之前 · Two distinctly different groups are traditionally included in the saurischians—the Sauropodomorpha (herbivorous sauropods and prosauropods) and the Theropoda (carnivorous dinosaurs). These groups are placed together on the basis of …
Dinosaurs Portal | Britannica
Dinosaur, the common name given to a group of reptiles, often very large, that first appeared roughly 245 million years ago (near the beginning of the Middle Triassic Epoch) and thrived worldwide for nearly...
dinosaur summary - Encyclopedia Britannica
Most types of dinosaurs flourished until late in the Cretaceous Period (65.5 million years ago), then disappeared within the next million years. Two theories for the cause of this mass extinction following some 180 million years of existence are that volcanism and mountain-building cycles altered the habitat and changed the climate or that one ...
6 Awesome Dinosaur Species You Should Know | Britannica
This Encyclopedia Britannica animals list features 6 awesome types of dinosaurs.
dinosaurs at a glance - Kids | Britannica Kids | Homework Help
From studying these remains, scientists think that dinosaurs were the ancient relatives of today’s crocodiles, snakes, lizards, and birds. Below is a guide to some well-known dinosaurs. The first section groups dinosaurs by type.
dinosaur - Students | Britannica Kids | Homework Help
The name dinosaur comes from the Greek words deinos (“terrible” or “fearfully great”) and sauros (“reptile” or “lizard”). Scientists have discovered and named some 1,000 dinosaur species. New species are found every year as the result of scientific explorations around the world.
Dinosaur - Herding, Socialization, Adaptation | Britannica
6 天之前 · These sites, dating from the Late Triassic Period (235 million to 201.3 million years ago) to the latest Cretaceous (66 million years ago), document herding as common behaviour among a variety of dinosaur types.
Dinosaur - Extinction, Fossils, Evolution | Britannica
2 天之前 · Dinosaur - Extinction, Fossils, Evolution: Dinosaurs lived in many kinds of terrestrial environments, and although some remains, such as footprints, indicate where dinosaurs actually lived, their bones tell us only where they died.
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