‘Hot-blooded’ T-rex was a hungry menace

Tyrannosaurus rex has traditionally been depicted as a cold-blooded killer. But now scientists have found the predator was warm to hot blooded, and it would have made the species far more menacing.

A study of fossilised leg bones shows that the T-rex had a fast metabolism, which would have made the dinosaur more active and given it a voracious appetite.

In contrast, dinosaurs such as triceratops and stegosaurus had low metabolic rates like those of lizards.

The research was published in the journal