Tyrannosaurus (meaning "tyrant lizard") is an extinct genus of tyrannosaurid theropod dinosaur that lived in North America during the Late Cretaceous period around 73-66 million years ago. The genus includes two valid species; Tyrannosaurus rex and Tyrannosaurus mcraeensis. However, two additional species, Tyrannosaurus imperator and Tyrannosaurus regina, have been proposed, though paleontologists near-universally agree upon their invalidity. Often credited as the king of the dinosaurs…
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