Charles Gilmore, one of the last major figures of America’s “Golden Age” of dinosaur hunting, is shown here in 1924 with a set of tail vertebrae of the dinosaur Diplodocus. The enormous job of assembling the full skeleton lay ahead, which may account for the somber expression on Gilmore’s face. Click this photo to learn more about Gilmore’s remarkable career at the Smithsonian’s National Museum of Natural History.
