The T. rex had a body temperature similar to our own

The fearsome Tyrannosaurus rex might have had an internal body temperature similar to that of modern-day elephants — and not too dissimilar to humans. By examining the arrangement of isotopes in the enamel of fossilised T. rex teeth, researchers estimate that the dinosaur’s internal temperature was approximately 36 °C. Narrowing down the creature’s body temperature can hint at what kind of diet it needed to sustain its homeostasis, and where it was able to roam.