Robert Silverberg has been nominated for and won more awards for his fiction than any other writer in the science fiction genre. This classic, now finally back in print, sweeps us--and Clay, the main character--into Earth's far-away future. It's a time when no one has heard of Shakespeare, Mozart, or Darwin, and when the planet is inhabited by beings of great intelligence, ambivalent sexuality, and extraordinary powers. Clay embarks on a panoramic journey, encompassing a billion years, and comes to understand that the era from which he came is nothing more than a minute fiber in the band of time.