Aradhna Tripati

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

As of September 2026: Led the lab that performed the isotope analysis

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

Notable Quotes

For an animal this famous, it is remarkable how little we actually knew.

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

Thermal physiology drives behavior, range, energy budget and how a species responds to a changing climate. Without it, you don't really have an understanding of the animal.

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