Is it a sculpture or a machine? For the past several years, woodworker Erich Schatt of Zurich, Switzerland has used his free time designing and building an exquisite machine built entirely of wood. What exactly does the machine do? Well, mainly it causes people’s jaws to drop whenever they see Erich sitting in the driver’s seat pedaling away on this amazing contraption, spinning the dozens of wooden gears whose movements are intricately intertwined using wooden chains (that resemble the drive chain on a bicycle).