High on Mars Hill, Flagstaff, Arizona, Percival Lowell's observations of Mars in the 1890s and its supposed canals created Martian fever and birthed an exotic world of red fiction. Show more
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High on Mars Hill, Flagstaff, Arizona, Percival Lowell's observations of Mars in the 1890s and its supposed canals created Martian fever and birthed an exotic world of red fiction. Show more