Atomic clocks are timekeeping devices that use the vibrations of atoms (commonly cesium, rubidium, or hydrogen) as their ...

The advantage of a radio-controlled clock that receives the time signal from WWVB is that you never have to set it again. Whether it’s a little digital job on your desk, or some big analog wall ...

Expected talks between Iran and the United States would be a late, and perhaps last, opportunity to control Tehran’s nuclear ambitions and avoid war. By Steven Erlanger Steven Erlanger has ...