FOR THE discerning timekeeper, most effective an atomic clock will do. While the most efficient quartz timepieces will lose a millisecond each six weeks, an atomic clock may now not lose one thousandth of 1 in a decade. Such units underpin the entirety from GPS and the web to stock-market buying and selling. That can appear excellent sufficient for many. However in a paper just lately revealed in Nature, researchers file being able to construct its successor: the nuclear clock. Ekkehard Peik, one of the most box’s pioneers, says the sort of clock generally is a issue of one,000 instances higher than these days’s usual atomic clocks.