The History of Timekeeping

Sundial

Clepsydra

Astrolabe

Candle Clock

Sandglass

Mechanical Clock

Spring-Driven Clock

Pendulum Clock

Quartz Clock

Cesium Atomic Clock

Cesium Atomic Clock

During the year of 1955 in Britain’s National Physical Laboratory, the Cesium Clock was invented. The atomic clock was an invention that is so significant to our contemporary life. Without it we would be unable to do many things such as have communication and transportation.

How the cesium atomic clock works