NIST boffins shrink atomic beam clock to the size of a postage stamp

It's not the most accurate atomic clock in the world, but the NIST team behind it believes they can fix that

There's a new atomic clock on the block over at the US National Institute of Standards and Technology (NIST), and while it's not as accurate as its predecessors it does have one big advantage: it's small enough to stick in your pocket.…

from The Register