Nineteenth century California photographer Muybridge's collection of time-lapse nude photographs set against a ruled backgound shows men, women, and children moving through ordinary tasks, revealing what the human eye cannot see: the articulation of bone and muscle, balance with shifting weight and flesh, interacting with gravity through the sequence of each movement. Frames were captured at 1/6000th of a second. It remains the classic study for artists, teachers, and animators; and a technological triumph that also captures the beauty of the human form in motion. ( )