T. rex Had Human‑Like Temperature

Researchers at UCLA analyzed tiny samples of enamel and dentin from a T. rex tooth using isotopic (carbon–oxygen bond) mass spectrometry and report an internal body temperature of about 36 °C (97 °F). The result suggests T. rex was physiologically warmer than modern reptiles but cooler than modern birds, supporting an energetically active metabolism and explaining its high‑latitude fossil record. — This constrains long‑running public and scientific debates about dinosaur thermoregulation, predator ecology, and how climate/latitude affected dinosaur distribution and behavior.