New research shows that T.rex and fearsome predators T. mammalian/T. rexes were warm-blooded, in line with birds and mammals. Paleontologists spent years trying to determine whether dinosaur blood flowed colder or warmer.
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However, in a new paper published in the journal Nature, scientists are unveiling a novel method for studying dinosaurs' metabolic rates, using clues in their bones that indicated how much the individual animals breathed in their last hour of life.
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