Clocks on Earth are ticking a bit more regularly thanks to NIST-F4, a new atomic clock at the National Institute of Standards and Technology (NIST) campus in Boulder, Colorado.

The watch on your wrist might seem pretty accurate on a day-to-day basis but it’s got nothing when compared to atomic clocks. Scientists use atomic clocks for a variety of purposes, and the more ...

On a campus in Boulder, Colorado, time just became a little more exact. Inside the National Institute of Standards and Technology, or NIST, a new atomic clock named NIST-F4 has begun to tick ...

Atomic clocks use these frequencies — specifically, absorbing and emitting photons at regular intervals to keep time. They are the most accurate clock we have to measure time in seconds.

Watch the 2023 Doomsday Clock announcement: The clock has ticked minutes or seconds toward or away from catastrophe over the years. Wars bring it closer, treaties and cooperation further away.

Scientists at the National Institute of Standards and Technology track time with atomic clocks. But what is time, really? Physicists are still trying to answer that question.

The most precise and accurate atomic clock in the world, the ultracold strontium clock at JILA in Boulder, is like a stopwatch that can count the billionths of a nanosecond, or 18 digits past the ...

Xin Zheng et al, Reducing the Instability of an Optical Lattice Clock Using Multiple Atomic Ensembles, Physical Review X (2024). DOI: 10.1103/PhysRevX.14.011006 .

According to scientists at NIST in Boulder, their newest atomic clock, the NIST-F4, will help track time more precisely and help put global time on a more accurate frequency.

In 2023, the hands of the Doomsday clock inched forward for the first time in three years to show 90 seconds to midnight — up from 100 seconds to midnight, where they had remained since 2020.The ...

The atomic scientists' Doomsday Clock is now 75—and threats to civilization still abound. A Cold War icon, the clock conveys scientists’ views on humankind’s risk of destroying itself.