- NICT is the first in the world to generate national standard time by reference to an optical clock. - By adding an optical lattice clock to the time system, time is kept within five billionth of a ...

(NEXSTAR) — We’re just a couple of weeks away from the end of daylight saving time, the back half of a twice-a-year practice the U.S. has observed for decades. Whether the U.S. should observe ...

An experimental atomic clock based on a single mercury atom is now at least five times more precise than the national standard clock based on a "fountain" of cesium atoms, according to a paper by ...