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- W2077563669 abstract "Mariner 9 has provided a refutation or reinterpretation of several historical claims for Martian biology, and has permitted an important further characterization of the environmental constraints on possible Martian organisms. Four classes of conceivable Martian organisms are identified, depending on the environmental temperature, T, and water activity, aw: Class I, high T, high aw; Class II, low T, high aw; Class III, high T, low aw; and Class IV, low T, low aw. The Viking lander biology experiments are essentially oriented toward Class I organisms, although arguments are given for the conceivable presence on Mars of organisms in any of the four classes. Organisms which extract their water requirements from hydrated minerals or from ice are considered possible on Mars, and the high ultraviolet flux and low oxygen partial pressure are considered to be negligible impediments to Martian biology. Large organisms, possibly detectable by the Viking lander cameras, are not only possible on Mars; they may be favored. The surface distribution of Martian organisms and future search strategies for life on Mars are discussed." @default.
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- W2077563669 date "1976-06-01" @default.
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- W2077563669 title "The prospects for life on Mars: A pre-Viking assessment" @default.
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- W2077563669 doi "https://doi.org/10.1016/0019-1035(76)90039-7" @default.
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