Tyrannosaurus rex AMNH 5027

Tyrannosaurus rex AMNH 5027 in the Hall of Saurischian Dinosaurs at the American Museum of Natural History in New York. Barnum Brown collected it in Montana in 1908, and for much of the 20th century this was the T. rex most people pictured, because in December 1915 it became the first T. rex skeleton ever mounted for the public. The mount is a mix: much of the spine and rib cage is real fossil bone, the legs and hips are replicas, and the skull on the skeleton is a cast, with the real skull shown in its own case. The pose was reworked in the 1990s into the horizontal, stalking stance you see today.