T. rex body temperature was close to that of humans

After millions of years of extinction, fossilized teeth have revealed new information about the famous dinosaur Tyrannosaurus rex: its body temperature was approximately 36 degrees Celsius, close to that of modern humans and elephants. A research team led by scientists at the University of California, Los Angeles, reached this conclusion after examining the enamel of three fossilized T. rex teeth. The study was published in the journal Science Advances on September 16. The scientists relied on a technique that analyzes how specific isotopes are distributed within tooth enamel; these distributions vary depending on the temperature at which the enamel formed, allowing them to estimate the dinosaur’s body temperature at approximately 36.3 degrees Celsius. The findings support previous evidence that T. rex was capable of generating its own body heat internally, rather than relying entirely on environmental heat like many modern reptiles. Researchers suggest that this ability may have helped it remain active and live in various regions of North America, including colder areas and higher latitudes.