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1 he lived about 68 million years ago. Rex was 38 feet long. His head was 1.52 meters. Tyrannosaurus rex had a life expectancy of about 28 years. Rex lived in the western United States, including Montana and Wyoming. T. rex was a huge carnivore and primarily ate herbivorous dinosaurs, including Edmontosaurus and Triceratops.
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Tyrannosaurus rex had a life expectancy of about 28 years. Rex lived in the western United States, including Montana and Wyoming. T. rex was a huge carnivore and primarily ate herbivorous dinosaurs, including Edmontosaurus and Triceratops.