Hugh Faust presents an inside look at the science and logistics of documenting rare, endangered, and previously unknown species in some of the world’s most remote and inaccessible regions. His work combines leading scientific teams into extreme environments with conducting field research himself. Drawing on expertise across a wide range of organisms—from big cats to insects, trees, and freshwater mussels—Hugh shares stories of species discovery and rediscovery, including organisms once thought to be extinct.