Study finds T. rex body temperature similar to modern elephants

Study finds T. rex body temperature similar to modern elephants

Researchers at the University of California, Los Angeles and the Natural History Museum of Los Angeles County reported that analysis of fossilized T. rex teeth indicated an average body temperature of about 97 °F (36 °C), comparable to modern humans and elephants. Earlier reports from the same team, described in an Ars Technica article, noted that clumped isotope thermometry on three teeth yielded a similar temperature estimate, higher than that of contemporary crocodilians.

A Yahoo piece later highlighted the findings, emphasizing that the warm-blooded interpretation supports the view of T. rex as an active predator.

Actors

Robert Eagle Aradhna Tripati Thomas Holtz Jr. University of California, Los Angeles Natural History Museum of Los Angeles County Science Advances

Locations

Natural History Museum of Los Angeles County University of California, Los Angeles (UCLA) Alaska, United States Mexico North America

Articles

September 20, 2026
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Isotope analysis suggests Tyrannosaurus rex maintained a body temperature near that of modern elephants
Isotope analysis suggests Tyrannosaurus rex maintained a body temperature near that of modern elephants

Ars Technica • 20 Sep 09:00

Researchers used clumped isotope thermometry on three T. rex teeth and found an average body temperature of about 36 °C, comparable to large mammals and higher than contemporary crocodilians, indicating a likely endothermic physiology.

Credibility 78% Manip. 8% Center
September 18, 2026
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Study Estimates Tyrannosaurus rex Body Temperature Around 97°F
Study Estimates Tyrannosaurus rex Body Temperature Around 97°F

Newser • 18 Sep 17:34

Analysis of fossilized teeth suggests the extinct predator maintained an average body temperature near 97 degrees Fahrenheit, comparable to modern humans and elephants.

Credibility 73% Manip. 8% Center
September 17, 2026
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Study estimates Tyrannosaurus rex body temperature around 97°F
Study estimates Tyrannosaurus rex body temperature around 97°F

New York Post • 17 Sep 20:07

Analysis of enamel from three T. rex teeth suggests the predator maintained an average core temperature of about 97 degrees Fahrenheit, comparable to modern mammals.

Credibility 78% Manip. 8% Center
UCLA study estimates Tyrannosaurus rex body temperature at about 97°F
UCLA study estimates Tyrannosaurus rex body temperature at about 97°F

Yahoo • 17 Sep 16:46

Using refined isotope analysis of tooth enamel, researchers determined that T. rex likely maintained a body temperature similar to modern mammals, supporting the view that it was a warm-blooded, active predator.

Credibility 72% Manip. 32% Center
September 16, 2026
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Study estimates Tyrannosaurus rex body temperature at about 97°F
Study estimates Tyrannosaurus rex body temperature at about 97°F

KSL News • 16 Sep 23:50

Analysis of fossil tooth enamel suggests the late Cretaceous predator maintained a body temperature similar to modern humans, supporting the view that it was endothermic.

Credibility 72% Manip. 8% Center
Study estimates Tyrannosaurus rex body temperature at about 97°F
Study estimates Tyrannosaurus rex body temperature at about 97°F

CNN • 16 Sep 18:48

Analysis of fossil teeth suggests the iconic predator maintained a body temperature similar to modern warm-blooded animals, supporting the view that it was an active, endothermic species.

Credibility 78% Manip. 8% Center