Prehistoric Dinosaur Hub on Instagram: "Spinosaurus, Giganotosaurus, and Tyrannosaurus rex are often called the “Big 3” because they were among the largest carnivorous dinosaurs ever discovered. Spinosaurus was the longest, adapted to water; Giganotosaurus was one of the heaviest land hunters; and T. rex had the most powerful bite force ever measured in a land animal. Together, they represent the peak of predator evolution in the Mesozoic—giants from different times and continents, each ruling t