question edit history translations

When did the dinosaurs first appeared on Earth?

about 10 million years ago

about 70 million years ago

about 230 million years ago

about 600 million years ago

The oldest known findings of dinosaurs are about 230 million years old. Paleontologists think that the early dinosaur genus Eoraptor resembles the common ancestor of all dinosaurs; if this is true, its traits suggest that the first dinosaurs were small, bipedal predators.

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15

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17

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32

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13

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11

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17

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24

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21

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This kind of tilted forest is a common sight in subarctic taiga. What is this phenomenon caused by?

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