Tyrannosaurus rex holotype CM 9380

Tyrannosaurus rex CM 9380 in Dinosaurs in Their Time at the Carnegie Museum of Natural History in Pittsburgh. This is the holotype, the name-bearing skeleton every other T. rex is compared against. Barnum Brown found it at Hell Creek, Montana, in 1902, and the American Museum of Natural History later sold it to Pittsburgh for $7,000. The mount mixes real fossil bone with casts: parts of the skull were rebuilt from casts of another specimen. Look for its opponent too, a cast T. rex posed fighting it over a meal, so you can compare the original with a copy in one glance.