The first accurate atomic clock was built in 1955. Since when the second being based on atomic time and defined as the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two levels of the caesium atom.
Wanna have a ceaseless source of positive energy? Radiating Clock will brighten up your desktop and fill your time with festive moods. Every minute passing by your side will devine that something marvellous is already waiting for you.
Web Page Thumbnails 2.8.0: Free software to easily capture thumbnails of web pages