The Long Now Foundation is building a clock th...  ...tion is building a clock that is supposed to last 10 ,000 years, and chime with a different song every...  ...once a year. The century hand advances once every 100 years, and the cuckoo comes out on the millennium...  ...cuckoo to come out every millennium fo...

This article gives answers to how ten everyday things work. These are some interesting facts to know, and you can surely use them to impress your friends. Some examples of what's explained are sunscreen, joint cracks, fr...