Alessandro Chiarenza

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Study confirms T. rex was warm-blooded with a human-like temperature

As of September 2026: Modeled T. rex's potential range from the measured temperature

A Tyrannosaurus rex ran a body temperature of about 97 degrees Fahrenheit in life, nearly identical to a modern human. Chemists extracted the figure from rare isotope bonds preserved in fossilized tooth enamel — the first direct temperature measurement of the dinosaur.

Updated Sep 20

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Now we have empirical evidence using this geologic thermometer.

from Study confirms T. rex was warm-blooded with a human-like temperature · Updated Sep 20

Using paleoclimate models of the past, we were able to reconstruct a range in North America 66 million years ago that stretched from Mexico to Alaska.

from Study confirms T. rex was warm-blooded with a human-like temperature · Updated Sep 20