Description: 100 years ago in August of 1914, the Panama Canal opened to commercial shipping. Smithsonian scientists knew the canal would create major environmental changes and have spent the last 100 years documenting them.
Description: Smith Hempstone Oliver, associate curator in the Section of Land Transportation, poses with a Greene and Dyer monocycle in front of the United States National Museum, SIA Acc. 11-006, MAH-41054.