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
Human mission to Mars Mars mission plans shows the various mission proposals that have been put forth by multiple organizations and space agencies in this field of space exploration. Plans have varied from scientific expeditions in which a small (2 to 8) group visits Mars for a period of a few weeks or year, to the permanent colonization of Mars. In the 2010s, numerous American, European, and Chinese agencies were developing proposals for human missions to Mars. They are now developing and testing the technologies. Mars in fiction is a frequent target of exploration and settlement in books, graphic novels, and films. The energy