Peroid Saurischia Theropoda Tyrannosauridae Late Cretaceous Length 45 feet Weight 7 Tons Range United States and Canada Known throughout the world as the most popular of all dinosaurs, this fearsome beast is as exciting now as it was when it was discovered in 1902. Combining immense size and strength, the Rex is considered to be the supreme specimen of predatory design. It had four foot long jaws that formed a dreadful maul armed with rows of thick, six-inch serrated teeth. Equipped with powerful jaw muscles for carving huge gulps out of its prey, the Rex could inflict massive damage. Knowledge is limited.
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