The common name for the species Tyrannosaurus rex is the "T. rex" or simply "T. rex." This dinosaur, which lived during the late Cretaceous period, is one of the most famous and recognizable species due to its immense size, powerful build, and fearsome reputation as a predator. Characterized by its large skull, sharp teeth, and small arms, T. rex played a significant role in popular culture, appearing in films, books, and exhibitions. Fossil evidence indicates it was among the largest terrestrial carnivores, with adaptations that suggest it was an apex predator of its ecosystem.