Not to be confused with GigantosaurusGiganotosaurus is a dinosaur that lived in the Mid Cretaceous Period about 104-97 million years ago. It is one of the biggest carnivores, bigger than Tyrannosaurus but smaller than Spinosaurus. It is 13 meters long and 3.7 feet tall at the hips. It weighed 8 tons. Giganotosaurus was first found by Ruben Carolini in 1994. Giganotosaurus lived in South America. The name Giganotosaurus means "Giant Southern Lizard". He had a skull 1.6-1.76 meters long, perhaps the longest among the Theropods.