as.com

Scientists say they may have discovered why T. rex had such small arms: “Evolution doesn’t like to have everything all at once”

A new study suggests Tyrannosaurus rex’s tiny arms were the evolutionary price of developing a gigantic head and a devastating bite. For decades, the small arms of Tyrannosaurus rex have been one of ...

T. rex was closer to a bird than a crocodile in body temperature? New fossil tooth study reveals how the dinosaur survived Arctic winters and hunted across North America

Scientists determined Tyrannosaurus rex had a body temperature around 97.3 degrees Fahrenheit. This was calculated by analyzing chemical signatures within the dinosaur's fossilized tooth enamel. The ...
Phys.org

T. rex's direct ancestor crossed from Asia to North America, new study finds

Tyrannosaurus rex evolved in North America, but its direct ancestor came from Asia, crossing a land bridge connecting the continents more than 70 million years ago, according to a new study led by UCL ...
EurekAlert!

T. rex’s direct ancestor crossed from Asia to North America

The piece illustrates the disparity of the Northern and Southern hemisphere’s evolution of terrestrial Cretaceous faunas after the Cretaceous Thermal Maximum. On the left, End Cretaceous Southern ...