(bymuratdeniz/iStock/Getty Images Plus) Although there are many variables in life, there's one metric by which our existence ...

Atomic clocks exploit the properties of atoms to create incredibly precise 'ticks.' Nate Phillips, NIST Most clocks, from ...

Chinese breakthrough in ultraviolet crystals could lead to navigation systems resistant to jamming ...

To find out how clock accuracy is verified and which reference is used for comparison, we visited the Belarusian State Institute of Metrology (BelGIM), where most of the national standards are kept.

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 ...

What if time could be measured with near-perfect precision? Atomic clocks do exactly that — using atoms as nature’s most ...