Mars City was a city on Mars by the 31st Century. There was a miniature of it on display in Metropolis that was an exact replica, including the impenetrable dome. ("Supergirl's Greatest Challenge!")
Advertisement
Mars City was a city on Mars by the 31st Century. There was a miniature of it on display in Metropolis that was an exact replica, including the impenetrable dome. ("Supergirl's Greatest Challenge!")