“Alaska”

A 66-million-year-old tooth reveals T. rex was nearly as warm as a human

Chemical clues preserved inside fossilized T. rex teeth reveal that the dinosaur maintained a body temperature of about 97 degrees Fahrenheit, almost identical to humans. The finding provides direct evidence that the giant predator was warm-blooded, helping explain how it stayed

All Top News -- ScienceDaily · 2026年9月20日 05:56