The Tyrannosaurus rex, often simply called T. rex, was one of the largest land carnivores to ever roam the Earth. This massive dinosaur lived during the late Cretaceous period, around 68 to 66 million years ago. With its powerful jaws and sharp teeth, it was a top predator, hunting other dinosaurs for food. Its strong legs allowed it to run quickly, despite its enormous size. T. rex had small, yet strong arms that were likely used for grasping prey. Fossils of this dinosaur have been found in North America, providing scientists with valuable information about its behavior and environment. The Tyrannosaurus remains a popular symbol of dinosaurs in movies and books, captivating the imagination of people everywhere.