Dune has inspired a nearly 60-year-long argument about the boundaries between fantasy and science fiction. Frank Herbert's seminal classic features spaceships, faster-than-light travel, laser guns, and aliens. It also delivers predestined heroes, a legendary prophecy, superpowers, and at least one magic potion. The line is blurry at best, and Dune's blend of genres helps it succeed. The Water of Life allows the story to introduce some of its most esoteric elements.