see more

A philosopher watching a pair of butterflies, 1814-1819. From Pictures after Nature, an album by Katsushika Hokusai (1760-1849). (Photo by Ann Ronan Pictures/Print Collector/Getty Images)

A philosopher watching a pair of butterflies, 1814-1819. From Pictures after Nature, an album by Katsushika Hokusai (1760-1849). (Photo by Ann Ronan Pictures/Print Collector/Getty Images)