First Paperback, Contains the Hugo and Nebula Award-winning "The Ultimate Earth" When a giant meteor crashes into the earth and destroys all life, the small group of human survivors manage to leave the barren planet and establish a new home on the moon. From Tycho Base, men and woman are able to observe the devastated planet and wait for a time when return will become possible. Generations pass. Cloned children have had children of their own, and...