Knowing whether an animal is warm-blooded or cold-blooded can tell researchers a lot about the species’ behavior and geographic range. While warm-blooded creatures, called endotherms, such as humans, ...

Chemical clues preserved inside fossilized T. rex teeth reveal that the dinosaur maintained a body temperature of about 97 degrees Fahrenheit, almost identical to humans. The finding provides direct ...

UCLA scientists used portions of dinosaur teeth to pin down Tyrannosaurus rex’s temperature for the first time, placing it at 97 degrees Fahrenheit, comparable to a human. A warm-blooded T. rex would ...

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Scientists in North Dakota recently discovered what researchers believe is the first known trackway left by an adult T. rex — preserving the predator's footsteps some 66.5 million years after it ...

A broken rib from Scotty, the largest known T. rex skeleton, contains an extraordinary fossilized network of blood vessels formed while the dinosaur was healing. Scientists used neutron and X-ray ...

Christina Applegate was spotted for the first time since her lengthy hospital stay. In a brief video clip, the actress, 54, showed off her long, blown out hair after having it colored in her signature ...

Researchers estimate the T. rex was walking at a speed of roughly 3.4 to 4.5 miles per hour. Andrey Atuchin Roughly 66.5 million years ago, a hulking Tyrannosaurus rex marched through the then-swampy ...

Hotter than a crocodile, cooler than a chicken, T. Rex was definitely warm-blooded, according to a new study. By Carolyn Y. Johnson The last vestiges of warmth drained out of a Tyrannosaurus rex’s ...

Kent Hups set out one morning on a research expedition in the famed Hell Creek Formation, a series of fossil-rich sedimentary rock layers in the western United States. The vast formation, spanning ...

Experts say they have found new evidence that Tyrannosaurus rex was warm-blooded, meaning it could produce its own heat and keep it stable - like humans! According to the study, the huge predator had ...

“Rex Junior” was discovered on a Wyoming ranch decades ago, but paleontologist Paul Sereno says researchers are only now realizing just how extraordinary it is Dan Vidal; Getty A 67-million-year-old T ...