Optical lattice atomic clock could ‘redefine the second’
http://www.bbc.co.uk/news/science-environment-23231206

Scientists say they have found a more accurate way to measure time.

We currently use atomic clocks to count the seconds, but tests on an alternative atomic timekeeper have revealed that it is more precise.

The devices, called optical lattice clocks, lost just one second every 300 million years – making them three times as accurate as current atomic clocks.

more….

lasers amaze me, I might start a database on all the things lasers can do

it would be a very long list