For this new edition, thanks must go first to Bill Schafer, my publisher and tireless advocate of my work, and to my partner, Orla Swift. A big tip of the hat to Jenny Crisp, my dedicated copy editor, and to Georgene Russell for fixing my Russian transliterations. Dr. Birgit Krummheuer at the Max Planck Institut für Sonnensystemforschung was most generous in getting me permission to use the gorgeous Mars photo on the cover.
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