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Tyrannosaurus rex

Part of Hall of Saurischian Dinosaurs.

T. Rex fossil mount in the Museum's Hall of Saurischian Dinosaurs. D. Finnin/© AMNH
The 4-foot-long jaw. The 6-inch-long teeth. The tiny arms. 

Almost everything about Tyrannosaurus rex indicates the enormous power of one of the largest theropod dinosaurs that ever existed.

The first skeleton of Tyrannosaurus rex was discovered in 1902 in Hell Creek, Montana, by the Museum's famous fossil hunter Barnum Brown. Six years later, Brown discovered a nearly complete T. rex skeleton at Big Dry Creek, Montana. The rock around it was blasted away with dynamite to reveal a “magnificent specimen” with a “perfect” skull. This skeleton, AMNH 5027, is on view in the Museum's Hall of Saurischian Dino