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
Dora the Explorer: Journey to the Purple Planet the top of the tall mountain. When they reach the top of the mountain, the group launch themselves into outer space. Dora, Boots, and the aliens are required to find 4 colored space keys on different planets to unlock the Space Door to the Purple Planet. First, they find the Green Key on the slimy Green Planet. Next, they go to bubbly and musical Yellow Planet to find the Yellow Key. Then, they go to the windy and nebular Blue Planet to find the Blue Key. Last, they find the Red Key on the mechanical Red Planet. After opening the