Da Vinci--The Genius: Human-powered ornithopter, a wing-flapping device intended to fly. Courtesy: Grande Exhibtions

From the press release:
DynaTheaterís Space Next 3D: A Journey that Began with Da Vinci

Usage: Public

Credit: Grande Exhibitions

Note: Representative image at left is often cropped for display purposes. Downloaded high-resolution images are not cropped.