The Last Theorem: Arthur C. Clarke and Frederick PohlHumanity, facing extermination from all but omnipotent aliens, the Grand Galactics, must overcome differences of politics and religion and come together or perish. In 1637, the French mathematician Pierre de Fermat scrawled a note in the margin of a book about an enigmatic I have discovered a truly marvelous proof of this proposition which this margin is too narrow to contain. He also neglected to record his proof elsewhere. Thus began a search for