In his 1963 science fiction novel, author Walter Tevis writes about an extraterrestrial who travels to Earth in a grandiose quest to ship water back to his dying planet. If the novel was re-released today, the extraterrestrial (who, incidentally, was played by rock legend David Bowie in the 1976 movie version) would more likely take one look at our once pristine home and keep on moving in hopes of finding a more inviting celestial object.