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.
Mercury atomic clock keeps time with record accuracy | Science Blog
I mean, wow! We need one. Get rid of that old NIST-F1 clunker. It's like so 1/70,000,000th of a second ago.technorati tags:Technosmoochery
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