Front cover of the American astronomer Percival Lowell's (1855-1916) book Mars. Powell's writings promoted his idea that dark lines observed on the surface of Mars were irrigation canals built by a Martian civilisation. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Van Ravenswaay, Detlev |
Bildgröße: | 2666 px × 3780 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |