A clock built by a team led by researchers at the National Institute of Standards and Technology (NIST) has been estimated to be 41 percent more accurate than the previous timekeeping record holder.

For many years, cesium atomic clocks have been reliably keeping time around the world. But the future belongs to even more ...

Scientists from MIT have developed what they believe is the most accurate atomic clock ever constructed. The clock, which utilizes quantum entanglement of atoms and a different element than most ...

Physicists in Germany have built the world's most accurate atomic clock. A team from the Physikalisch-Technische Bundesanstalt created a clock that works by measuring the vibration of ytterbium ions ...

Keeping track of time seems simple. A watch ticks, a pendulum swings, and a calendar flips. But at the quantum level, marking time is far more complicated — and far more expensive than anyone expected ...

An experimental atomic clock based on a single mercury atom is now at least five times more precise than the national standard clock based on a “fountain” of cesium atoms, according to a paper by ...

Improvements in clocks are setting the stage for a redefinition of the second. This is an Inside Science story. (Inside Science) -- Earlier this year, in a nondescript lab at the National Institute of ...

That big grandfather clock in the library might be an impressive piece of mechanical ingenuity, and an even better example of fine cabinetry, but we’d expect that the accuracy of a pendulum timepiece ...

Travellers have relied on accurate timekeeping for navigation since the development of the marine chronometer in the eighteenth century. Galileo, Europe’s twenty-first century navigation system, also ...