Original news saved on 8 February 2010, 06:50 GMT from Science Daily. More below:
Second 'quantum logic clock' based on aluminum ion is now world's most precise clock Physicists have built an enhanced version of an experimental atomic clock based on a single aluminum atom that is now the world's most precise clock, more than twice as precise as the previous pacesetter based on a mercury atom. The new aluminum clock would neither gain nor lose one second in about 3.7 billion years.
