silver-white stallion on blackBlack Andalusian stallion gallops on dark backgroundThe Cotopaxi volcano spews ash and vapor, as seen from El Pedregal, Ecuador, Thursday, Sept. 3, 2015. Cotopaxi began showing renewed activity in April and its last major eruption was in 1877. (AP Photo/Dolores Ochoa)The black Frisian stallion in the autumn foggy field. B&W photo.