Scientists have discovered the remains of a meat-eating dinosaur which would have towered over T. Rex. The find, probably bigger even than Giganotosaurus, was of a group of such dinosaurs, now named Mapusaurus roseae-
At forty feet long they were huge, but their bodies were more leanly built than the famous T. Rex, making them more agile, with their long knife-like teeth intended to slice through flesh rather than to crush bone. What's more, the find of a group of remains together suggests that they hunted as a pack.
Which must have been something to see!