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Description
The famous species Tyrannosaurus rex (‘rex’ meaning ‘king’ in Latin), commonly abbreviated to T. rex, is a fixture in popular culture around the world. It lived throughout what is now western North America, with a much wider range than other tyrannosaurids. Fossils of T. rex are found in a variety of rock formations dating to the last three million years of the Cretaceous Period, approximately 68 to 65 million years ago; it was among the last non-avian dinosaurs to exist prior to the Cretaceous-Tertiary extinction event.
Tyrannosaurus Rex and his kin may not have been predators at all, let alone apex predators. A theory which has gained wide acceptance in recent years is that the tyrannosaurids and similar theropods of that era were actually large scavengers.