Post deleted by john in The Fingerboard Posted January 13, 2001 · Report reply Hey Donuel, I've got some information on a perpetual motion machine you might want to invest in. - You smokin' crack man? Where did you get this information. I always heard the Asteroid belt planet referred to as Ganymede, perhaps that's just from the book series, the "Gentle Giants of Ganymede" (Science FICTION by the way). The most accepted theory on the great Martian canyon, the last I read, from the best evidence is liquid erosion. I must admit, your theories would make for great renderings and even better science fiction.