'Canals' on Mars, 1895.
© Science Museum / Science & Society Picture Library
Mars as seen by Percival Lowell (1855-1916) though his telescope, complete with the lines he interpreted as 'canals'. The book contained a detailed account of his observations, including Martian canals, seas and an atmosphere. Frontispiece of Lowell's 'Mars', published in Boston, New York State in 1895.