Fossil tooth analysis confirms Tyrannosaurus rex

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Fossil tooth analysis confirms Tyrannosaurus rex was warm-blooded | A new study published Wednesday in the journal Science Advances provides the first direct estimate of T. rex’s body temperature, using a technique that analyzes chemical signatures preserved in fossil teeth.
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T. rex’s teeth reveal the dinosaur’s body temperature for the first time | CNN

By using fossil teeth, scientists measured T. rex’s body temperature for the first time. They found evidence of an active, warm-blooded predator.

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