Carnotaurus was a predatory dinosaur that lived 70 million years ago. It was a large theropod which lived in South America during the Upper Cretaceous between about 72 and 70 million years ago. Although there is only one well-preserved skeleton, it is one of the best-understood theropods from the southern hemisphere. The skeleton, found in 1984, was uncovered in the Chubut Province of Argentina.