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2. Earth & Mars, as different as they are alike

3. The Empress of Mars

4. Equilateral : a novel

10. Exploring Mars and beyond : what's next for U.S. planetary science : hearing before the Subcommittee on Space and Aeronautics, Committee on Science, Space, and Technology, House of Representatives, One Hundred Twelfth Congress, first session, Tuesday, November 15, 2011