Giganotosaurus was one of the largest meat-eating dinosaurs. It roamed modern-day Argentina during the late Cretaceous Period, about 99.6 to 97 million years ago.

For a long time the T. rex was thought to be the largest carnivorous dinosaur. Today, Giganotosaurus is believed to have been slightly larger than a T. rex, though even Giganotosaurus ranks behind in size among the more recently discovered meat-eating dinosaurs.