Human mission to Mars propellant from the Martian Atmosphere. This proposal drew on concepts developed by the former "Case for Mars" conference series. Over the next decade, Zubrin developed it into a mission concept, Mars Direct, which he presented in a book, "The Case for Mars" (1996). The mission is advocated by the Mars Society, which Zubrin founded in 1998, as practical and affordable. In 1991 in Toulouse, France, the International Space University studied an international human Mars mission. They proposed a crew of 8 traveling to Mars in a nuclear-powered vessel with artificial gravity provided by rotation. On the surface, 40 tonne habitats
Flight to Mars (film) proposed but never made. "Flight to Mars" is not in the public domain. The copyright was renewed under Certificate # RE-26-731/RE-37-81 from the Copyright Office, Library of Congress. Rights were assigned to Wade Williams. "The New York Times" film review notes: ""Flight to Mars" is the second American film of the postwar era (after the previous year's "Rocketship X-M") to depict a manned space trip to the Red Planet". Critical reaction to "Flight to Mars" was not positive. Film reviewer Glenn Erickson characterized the film as derivative. "Of all the early space movies, none is so disappointing as "Flight to