This text presents the story of the development of atomic clocks and atomic timekeeping. It shows how and why reliable clocks were invented, how co-ordinated un... » 

This text presents the story of the development of atomic clocks and atomic timekeeping. It shows how and why reliable clocks were invented, how co-ordinated universal time was developed and how the need for increased precision, in the future, is driving atomic timekeeping to greater accuracy. «