By using a rare thorium nucleus as a timekeeper, physicists have demonstrated the first working nuclear clock, a device that could lead to even more precise clocks and new ways to search for dark ...

A breakthrough in chronometry decades in the making could redefine the limits of how we keep time. Using atoms of thorium-229, physicists have built functional clocks based not on the oscillations of ...

A new generation of optical atomic clocks, some accurate enough to lose less than a second over the entire age of the universe, is driving an international push to replace the cesium-based definition ...

For many years, cesium atomic clocks have been reliably keeping time around the world. But the future belongs to even more accurate clocks: optical atomic clocks. In a few years' time, they could ...

In a grandfather clock, a pendulum swings back and forth and this periodic motion is maintained using the energy stored in its suspended weights. This is done with the help of the escapement mechanism ...