Astronomer's theory that Mars canals are an optical illusion, 1904

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Astronomer's theory that Mars canals are an optical illusion, 1904 -

Clipped from The Pittsburgh Press, 15 Jul 1904, Fri,  Page 11

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  • Astronomer's theory that Mars canals are an optical illusion, 1904

    staff_reporter – 13 Dec 2018