A 66-Million-Year-Old Tooth Shows T. Rex Ran Almost as Warm as a Human Body

A study published September 16, 2026 in Science Advances used chemical signatures preserved in Tyrannosaurus rex fossil teeth to produce the first direct estimate of the dinosaur’s body temperature. The team’s analysis put T. rex at about 97 degrees Fahrenheit (36 degrees Celsius), nearly identical to humans, a result highlighted in a September 2026 ScienceDaily […]