A blueprint for nuclear clock accurate over billions of years

Quite neat! would you like to have a clock accurate to within a tenth of a second over 14 billion years – the age of the universe? here is the "the blueprint for a nuclear clock that would get its extreme accuracy from the nucleus of a single thorium ion."... and you wonder what use that would have? it could be used for "certain forms of secure communication – and perhaps of greater interest – for studying the fundamental theories of physics. A nuclear clock could be as much as one hundred times more accurate than current atomic clocks, which now serve as the basis for the global positioning system (GPS) and a broad range of important measurements.": http://www.physorg.com/news/2012-03-blueprint-nuclear-clock-accurate-billions.html