Tired of adjusting your clocks? You could always pick up an atomic clock and you'll never need to worry about setting the time again.

The ultimate accessory in exact timekeeping — the atomic clock — is set to become even more precise, after ultrashort laser pulses were successfully transmitted across open air to help ...

Just like an old-fashioned grandfather clock, which uses a pendulum to measure time, atomic clocks use the very regular and measurable oscillations of caesium atoms—9,192,631,770 of them make up ...

The National Institute of Standards and Technology building in Boulder, Colorado, houses lasers and quantum physics that unlock far more than the passage of time. NIST shares the building with the ...

That's where optical atomic clocks, which are about 100 times more precise than microwave-based atomic clocks, come in. (Image credit: Shutterstock) Updated on Saturday, June 15, at 3:38 p.m. ET.

[The 9 Biggest Unsolved Mysteries in Physics] Atomic clocks The current U.S. time standard is set by cesium clocks, in which cesium atoms are pulsed with microwaves.

Atomic clocks are our most precise timekeepers, with the best ones keeping time to within one second in 15 billion years. But there’s always room for improvement, as researchers at MIT have now ...