Der Unbesiegbare

The Invincible (Polish: Niezwyciężony) is a hard science fiction novel by Polish writer Stanisław Lem, published in 1964.The Invincible originally appeared as the title story in Lem's collection Niezwyciężony i inne opowiadania ("The Invincible and Other Stories"). A translation into German was published in 1967; an English translation by Wendayne Ackerman, based on the German one, was published in 1973. A direct translation into English from Polish, by Bill Johnston, was published in 2006. It was one of the first novels to explore the ideas of microrobots, smartdust, artificial swarm intelligence, and "necroevolution" (a term suggested by Lem for the evolution of non-living matter).