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. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Van Ravenswaay, Detlev |
Taille de l’image : | 2666 px × 3780 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |