Giganotosaurus

At 39-44 feet in length (even larger than Tyrannosaurus) Giganotosaurus has earned the name “Giant Southern Lizard”. It lived between 100 and 97 million years ago in what is now Patagonia in South America, and after its discovery in 1993 it sparked a conversation among paleontologists to rethink how large theropods could get. With a massive 6-foot long head its believed to have been a powerful enough hunter to take down massive sauropods like Argentinosaurus.