Tweel (A Martian Odyssey) Tweel (A Martian Odyssey) Tweel (also referred to as a "Tweerl", the exact pronunciation of the word is said to be impossible for humans) is a fictional extraterrestrial from the planet Mars, featured in two short stories by Stanley G. Weinbaum. The alien was featured in "A Martian Odyssey", first published in 1934, and "Valley of Dreams" four months later. Weinbaum died of lung cancer soon after, and a third installment in the series never saw fruition. Tweel remains one of the most recognised aliens in early science fiction, and is said to be an inspiration for aliens in the
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.