Eadweard Muybridge took a series of photographs to prove that all four feet of a horse leave the ground when it gallops (animation pictured), which became the basis of motion pictures.

Eadweard Muybridge was an English photographer known for his pioneering work in photographic studies of motion, and early work in motion-picture projection.

The Horse in Motion is a series of cabinet cards by Eadweard Muybridge, including six cards that each show a series of six to twelve "automatic electro-photographs" depicting successive phases in the movement of a horse, shot in June 1878. An additional card reprinted the single image of the horse "Occident" trotting at high speed, which had already been published in 1877.

A film, also known as a movie or motion picture, is a work of visual art that simulates experiences and otherwise communicates ideas, stories, perceptions, emotions, or atmosphere through the use of moving images that are generally, since the 1930s, synchronized with sound and other sensory stimulations.