[Utah-astronomy] Mercury atomic clock keeps time with record accuracy

Sometimes I wonder if it's possible to be too precise... Patrick ++++++++++++++++++++++++++++++++ The current version of NIST-F1--if it were operated continuously--would neither gain nor lose a second in about 70 million years. The latest version of the mercury clock would neither gain nor lose a second in about 400 million years. http://www.physorg.com/news72105805.html