TOP-F-840139-0000 Clever Hans, horse owned by Wilhelm von Osten, believed to be able to perform arithmetic operations and other intellectual activities Credit: TopFoto / Alinari Archives WARNING: Permission must be required for non editorial use. Please contact Alinari Archives Date of photography: 1904 Collection: TopFoto / Alinari Archives Object type: digital image Photographic technique: P digital image Technical info Image sizes (pixel): 3963 X 2772 Image sizes (cm at 300 dpi): 33 X 23 Image sizes (MB): 0.98 Color space: RGB