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We have no DNA from Brontosaurus, or any other dinosaur. DNA can last hundreds of thousands of years in permafrost, but no Brontosaurus fossils have been preserved constantly in permafrost. Additionally, Brontosaurus fossils are millions of years old, not hundreds of thousands, so even if it had been constantly frozen they probably would still have no DNA left. One last note: Brontosaurus is not a real dinosaur; you are referring to Apatosaurus.

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10y ago

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