(Patcharin Saenlakon/iStockphoto/Getty Images) The time-keeping offered by your watch or phone may be good enough for ...

Physicists have used radioactive lutetium to create what they say is the most accurate atomic clock ever, keeping time perfectly up to 19 decimal places.

The next generation of atomic clocks "ticks" with the frequency of a laser. This is about 100,000 times faster than the microwave frequencies of the cesium clocks which are generating the second at ...

In a new study, researchers carried out the most extensive coordinated comparison of optical clocks to date by operating clocks and the links connecting them simultaneously across six countries.

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The device, which traps thousands of atoms to keep time, is "pushing the boundaries of what's possible with timekeeping." Reading time 2 minutes New clock just dropped, but it’ll only drop a second ...