A British photographer, Eadweard Muybridge is known for his pioneering work in the use of multiple cameras to capture motion. He also invented the zoopraxiscope, a device to project motion pictures that pre-dated film. Born in England in 1830, he moved to San Francisco in 1855 as a publisher’s agent and bookseller. He began to build his reputation as a photographer in 1867 with photos of Yosemite and San Francisco and in 1868 was commissioned to photograph one of the U.S. Army’s expeditions. His series of photos of a galloping horse resolved the then-heated debate as to whether all four hoofs were off the ground at any one time.