In 1878, photographer Eadweard Muybridge settled a wager made on a widely-debated question: do all four hooves of a horse leave the ground when it runs? Muybridge set up a line of cameras, each of which was triggered when the horse ran into strings placed across its path. The resulting images settled the debate (all four hooves leave the ground) and led to the development of the zoopraxiscope, one of the earliest motion picture projection systems. To commemorate this historic event, Flickr user Ms. Cleaver knitted a cap showing the sequence of images.
Link -via Nerdcore | Image: Flickr user ms.cleaver