Documents the work of an early twentieth-century paleontologist, named after the famous circus icon by his ambitious parents, who grew up to work for the American Museum of Natural History and discovered the first documented skeletons of the Tyrannosaurus Rex and other noteworthy species.

From prehistory to present day, from remote Patagonia to the unforgiving badlands of the American West to the penthouses of Manhattan, this riveting narrative follows a fearless paleontologist who, after unearthing the first T-Rex fossils, saved NY's struggling American Museum of Natural History.