Why would a man who has built some of the fastest super-computers want to build a simple clock... because this clock is no ordinary clock. The concept is not revolutionary, just another machine which tells time, but what is fascinating is the way by which is measures time. Most timepieces today are the digital variety, relying on the natural vibration of a quartz crystal or an internal electronic oscillator to track the passage of time. What is different about Danny Hillis' clock is how it records time, as a binary serial adder, but is built solely of mechanical components. No electronics, no transistors, or internal oscillators! How is this possible? Follow the link and read on