The life of everyone on Earth depended on their sanity ... which they had long ago lost! For more than six years the silver rocket was like a tomb buried at the Earth's center. It wore the blackness of interstellar space for a shroud, and ten thousand gleaming stars were as the eyes of hungry, waiting worms. Five of the inhabitants of the rocket moved like zombies, stone-faced and dull-eyed, numb even to their loneliness. The sixth inhabitant did not move at all. He sat silent and unseeing. The