The Galápagos Islands are famed for their remarkable wildlife, including land and marine iguanas, land tortoises, four-eyed fish, and flightless cormorants and albatross. In 1835, Charles Darwin observed variations among the islands' species that inspired him to formulate the theory of natural selection. Eighty-eight years later, in 1923, a scientific expedition sponsored by the New York Zoological Society followed in Darwin's wake. Led by renowned...