#OnThisDay in 1878, Eadweard Muybridge took this series of images of a racehorse in motion. A former governor of California reportedly had bet on whether all the hooves were airborne at once, and hired Muybridge to settle the debate: https://publicdomainreview.org/collection/the-attitudes-of-animals-in-motion-illustrated-with-the-zoopraxiscope-1882 #OTD