Sub-Atomica was located in the Microverse (a universe accessed via the energies of shrinking). It was said that the Psycho-Man ruled at least five planets in this planetary system, one of which was the planet Traan, which was the planet that he inhabited at the time of his birth. Another planet in this system is Tok which is inhabited by the savage Lizard Men that were ruled by Zorak. Another planet in Sub-Atomica was Mirwood, ruled by an unnamed King and Princess Pearla who sought to live a relatively peaceful existence. Sub-Atomica and all other "microverses" were merged together into a unified Microverse.