why did the Dinosaurs disappear
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5
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Geological evidence indicates that dinosaurs became extinct at the boundary between the Cretaceous and Paleogene eras, about 66 million years ago, at a time when there was worldwide environmental change resulting from the impact of a large celestial object with the Earth and/or from vast volcanic eruptions.
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0
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due to heavy cyclones and tsunamis at 200million years ago
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