During which geological period did the T. Rex live?

The T. Rex, or Tyrannosaurus rex, lived during the Late Cretaceous period, which is a subdivision of the Cretaceous geological period that lasted from approximately 100.5 million to 66 million years ago. The Cretaceous is notable for the evolution and diversification of dinosaur species, including the T. Rex, which became one of the largest and most powerful terrestrial predators of its time.

In this geological period, the climate was much different from today, with higher temperatures and varying ecosystems, which supported a vast array of flora and fauna, including the famous dinosaur species. Understanding the context of the Cretaceous period is essential for studying dinosaur evolution, their habitats, and the events leading to their eventual extinction. The other periods listed, such as the Paleolithic (which refers to a time primarily concerned with human prehistory), Jurassic, and Triassic, do not correspond with the lifespan of the T. Rex, as they occurred either before or after this particular creature roamed the Earth.