There is a grasshopper clock outside the Library of Corpus Christi College, Cambridge University, UK. Visitors from all over the world often stop in front of the clock to admire, admire and sigh at the tremendous power of science and technology - "This 24K gold-plated clock has a diameter of 1-2 meters, but can not see any indicator of time, only 60 sharp teeth on its periphery. A giant grasshopper crawled on the top of the bell. As soon as the grasshopper grasped its limbs, it passed through a sharp tooth, which meant a second had passed.