Large mall like structures buried in regolith, pressurized habitats would be the first step toward human settlement the book suggests they can be built as Roman-style atria on the surface and then be buried with regolith, with easily produced Martian brick. As initial explorers leave hab-structures on the planet, subsequent missions become easier to undertake. He envisions a series of regular Martian missions with the ultimate goal of colonization, which he details in the seventh through ninth chapters. Chapters 1 and 4 deal primarily with Mars Direct.įor Robert Zubrin, the attractiveness of Mars Direct does not rest on a single cost-effective mission. The Case for Mars is, according to Zubrin, a comprehensive condensation for laymen of many years' work and research. The Mars Direct plan was originally detailed by Zubrin and David Baker in 1990.
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