E xpatriate Englishman Eadweard Muybridge (1830-1904), a brilliant and eccentric photographer, gained worldwide fame photographing animal and human movement imperceptible to the human eye. Hired by railroad baron Leland Stanford in 1872, Muybridge used photography to prove that there was a moment in a horse's gallop when all four hooves were off the ground at once. He spent much of his later career at the University of Pennsylvania, producing thousands of images that capture progressive movements within fractions of a second.