An analysis of 85 dinosaur species shows that tiny forearms in meat-eating dinosaurs were the result of an evolutionary trade-off.

A new study published by The Royal Society reveals the disproportionate arms of a T. rex can be linked directly to evolution.

A new study claims to have solved the long-standing mystery of why Tyrannosaurus rex had such disproportionately small arms. A Royal Society research paper published May 20 suggests that T. rex, which ...

Why did T. rex have such tiny arms? Scientists now think it’s because its giant head became the ultimate hunting tool. Across multiple dinosaur groups, stronger skulls and crushing jaws evolved ...

A new study explores the reason why the dinosaur T. rex has tiny arms.

At least five groups of two-legged, mostly meat-eating theropod dinosaurs experienced a shortening of the upper arms over the course of their evolutionary journey. But why did they have such comically ...

A new study has found that the T. rex's arms evolved to become smaller at the same time as its head grew to catch more prey Escher Walcott is a Writer/Reporter at PEOPLE, covering stories in ...

(CNN) - Scientists may have finally solved the mystery of why Tyrannosaurus rex had such tiny arms. T. rexes were 40 feet long and had a bite three times more powerful than that of a lion, according ...