Publication history of Superman written by Alan Moore with art by Curt Swan. Although the new Modern Age version of Superman is said to have already been active for many years, most previous Superman appearances and elements were rendered out of continuity by John Byrne's "The Man of Steel". Later stories such as "" bring many of the Silver Age elements back into continuity. In Byrne's version, Superman came from the planet Krypton which was re-imagined as a cold, sterile world in deep contrast to the wonderworld of the past 48 years. Once Kal-El's rocketship (containing genetic materials and a birthing-matrix which resulted in
Mongo (fictional planet) "familiarly Asian". Mongo (fictional planet) Mongo is a fictional planet where the comic strip (and later movie serials) of "Flash Gordon" takes place. Mongo was created by the comics artist Alex Raymond in 1934, with the assistance of Raymond's ghostwriter Don Moore. Mongo is depicted as being ruled by a usurper named Ming the Merciless, who is shown as ruling Mongo in a harsh and oppressive manner. The planet is depicted as being inhabited by different cultures, and having a varying ecosystem. The technology of these cultures varies from groups at a Stone Age level, to highly technologically advanced peoples.