Publication history of Superman Superman titles have followed two major story arcs. "Action Comics" deals with Superman and wife Lois adopting a Kryptonian child who is revealed to be the child of General Zod. After resolving this arc, Superman has dealt with the return of one of his most dangerous villains, Brainiac which resulted in the arrival of thousands of Kryptonians on Earth and sadly the death of his adoptive father. In "New Krypton", the Kryptonians create a new planet, New Krypton, and raise it opposite Earth's place in the solar system. In "", Superman decides to leave Earth to live among the Kryptonians,
Origin of Superman matures during the flight and emerges full-grown as an adult when he lands on Earth. He is greeted by a man and a boy who give him the idea of disguising himself as Clark Kent, after which he looks for a job at the Daily Planet. Among other concepts and characters, the radio program introduced kryptonite into the Superman mythology. These fragments of radioactive debris from Superman's home planet were created to allow actor Bud Collyer the occasional time off from recording, as Superman periodically succumbed to the baleful rays and be absent for some episodes. Kryptonite was incorporated into