The World’s Atomic Clock Timekeepers
When you set your watch to perhaps the speaking clock or the time on the internet, have you ever wondered who it is that sets those clocks and checks that they are accurate? There is no single master clock used for the world’s timing but there are a constellation of clocks that are used as a basis for a universal timing system known as UTC (Coordinated Universal Time). http://bit.ly/cj3gab
