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How Did the Tyrannosaur Evolve From Medium To Mammoth #EVOLUTION

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A crucial 20-million-year gap in tyrannosaur evolution has been colored in a bit by a fossil from a new species of dinosaur.The key fossil is a 90-million-year-old, grapefruit-sized partial skull. It was found in Uzbekistan’s Bissekty Formation. The tyrannosaur braincase shows that,... (más)

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