The Adventures of Superman (radio) home planet of Krypton is located on the far side of the sun, as opposed to a distant star system as it is in most stories. During the journey to Earth, baby Kal-el grows into an adult and emerges fully grown from his ship after it lands on Earth. He is never adopted by the Kents but immediately begins his superhero career. This was eventually retconned in later episodes to match the narrative of the comic books. This serial introduced the fictional mineral kryptonite, the radiation from which can weaken and even (in some continuities) kill Superman. Aside from giving
Mongo (fictional planet) wishes to unite Mongo's five warring realms (Arboria, Ardentia, Aerie, Aquaria, and Frigia). Krang's son, Ming, eventually does so by force. In the later Dynamite "Flash Gordon" series, Mongo is the base of Ming's empire. Mongo harbours a "Valley of Portals" which contains portals which lead to the other worlds Ming rules, including Arboria and Coralia. Arlene Williamson (the first wife of Al Williamson) and Jim Keefe both drew maps of the planet Mongo, based closely on Raymond's stories. The game "Flash Gordon & the Warriors of Mongo" (see below), also featured Lin Carter's map of the planet, similar to