The Horse in Motion (1878)
Commonly listed as the first movie ever made, The Horse in Motion was made by using multiple cameras and assembling the individual pictures into a single motion picture. (This is still a technique you can accomplish today. It’s really not that hard.) The Horse in Motion was scientifically made to answer the popularly debated question: Are all four of a horse’s hooves ever off the ground at the same time while a horse is galloping? This “movie” proved that, yes, they were and motion photography was born.