The bet that invented the movies — and starred a horse

For centuries, nobody could say for certain whether a galloping horse ever has all four feet off the ground at once. The eye is too slow. Painters guessed, and mostly guessed wrong, stretching horses out like rocking toys with front legs forward and hind legs back.

In 1870s California, the photographer Eadweard Muybridge was hired by the railway magnate Leland Stanford to settle it. The method was gloriously fiddly: a line of cameras beside the track, triggered in sequence as the horse ran past.

The pictures showed that yes, all four hooves do leave the ground — but at the moment the legs are gathered under the body, not flung out at full stretch. Every galloping horse in art had been drawn wrong.

Muybridge then set his sequences spinning on a device that threw them onto a screen, and audiences watched a horse move in projected light. Cinema has a horse somewhere in its birth certificate. 🐎

Why it still matters: slow motion is now in your pocket. If your horse or pony feels "off" and you can't see why, film them trotting on a hard, level surface, straight line, phone held steady, and watch it back frame by frame. Then send it to your vet. Gait problems hide from the eye and surrender to the camera — exactly as they did in 1878.