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Dinosaurs have always been recognized as an extremely varied group: over 900 non-avian dinosaur genera have been confidently identified (2018) with 1124 species (2016).
12 sie 2024 · Did all dinosaurs become extinct, killed when an asteroid hit the Earth 66 million years ago? Or could a few of them, somehow, have survived that mass extinction event – with their descendants...
29 mar 2023 · There is extensive evidence that dinosaurs existed. While the term "dinosaur" was first publicly used in an 1841 presentation, it linked decades of prior fossil discoveries.
2 lis 2023 · Dinosaurs lived for about 170 million years, and during that time, the continents gradually spread to form the shapes we recognize today. (Thanks, plate tectonics!) Dinosaurs continued to live on every continent; there are even fossils buried under the ice in Antarctica.
There's no universally accepted dinosaur species that lived earlier in time. Dating to around 230 million years ago, in the Late Triassic Period, the Ischigualasto Formation in Argentina contains an array of animal remains.
1 dzień temu · 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. Most died out by the end of the Cretaceous Period.
Non-bird dinosaurs lived between about 245 and 66 million years ago, in a time known as the Mesozoic Era. This was many millions of years before the first modern humans, Homo sapiens, appeared. Scientists divide the Mesozoic Era into three periods: the Triassic, Jurassic and Cretaceous.
