WASHINGTON (Reuters) - In western North America during the twilight of the dinosaur age, the unquestioned ruler was Tyrannosaurus rex, one of the largest terrestrial predators in Earth's history. But ...

WASHINGTON (Reuters) -Tyrannosaurus subdued prey with raw power, using bone-crushing bite force. But other meat-eating dinosaurs that rivaled T. rex in size used different approaches. Giganotosaurus ...

(via BBC Earth) You might think a dinosaur as big as a T.rex wouldn't be able to sneak up on anything. But these iconic giants might be sneakier than we once thought.

There is no question that the Tyrannosaurus rex was big. In fact, it may have been Earth’s biggest land predator of all time.