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By far the largest carnivore in its environment, Tyrannosaurus rex was most likely an apex predator, preying upon hadrosaurs, armoured herbivores like ceratopsians and ankylosaurs, and possibly sauropods.
Some experts have suggested the dinosaur was primarily a scavenger.
Fossils are found in a variety of rock formations dating to the Maastrichtian age of the upper Cretaceous Period, 68 to 66 million years ago.But in other respects Tyrannosaurus's skull was significantly different from those of large non-tyrannosauroid theropods.It was extremely wide at the rear but had a narrow snout, allowing unusually good binocular vision.As the archetypal theropod, Tyrannosaurus is one of the best-known dinosaurs since the 20th century, and has been featured in film, advertising, and postal stamps, as well as many other types of media.Tyrannosaurus rex was one of the largest land carnivores of all time; the largest complete specimen, located at the Field Museum of Natural History under the name FMNH PR2081 and nicknamed Sue, measured 12.3 meters (40 ft) long, Hutchinson et al.
In contrast the hind limbs were among the longest in proportion to body size of any theropod.