This is because they are still used for the international definition of units of time – the NIST-F1 cesium fountain clock, for example, is the current US civilian time standard clock.

If the new technology can be incorporated into an atomic clock, it could provide incredibly precise measurements of time. That, in turn, could shed light on some of the most mysterious problems in ...

That makes it the world’s most precise clock, ... World's most precise clock keeps time to 1 second in 3.7 billion years By Darren Quick. February 05, 2010 Facebook; Twitter; ...

In humankind's ever-ticking pursuit of perfection, scientists have developed an atomic clock that is more precise and accurate than any clock previously created. The new clock was built by ...

Today’s most advanced clocks keep time with an incredibly precise rhythm. But a new experiment suggests that clocks’ precision comes at a price: entropy. Entropy, or disorder, is created each ...

An atomic clock that sets the time by the teensy oscillations of strontium atoms has gotten so precise and stable that it will neither gain nor lose a second for the next 15 billion years. The ...

By comparing two clocks, scientists can measure the uncertainty in reading that frequency – how precise a clock is. Stability is how much a clock's ticks vary over a given amount of time.

The world's most precise clocks can reveal tiny time dilations predicted by Einstein's theory of relativity -- but that's not all. Tom O'Brian of the National Institute for Standards and ...

Some physicists are creating a revolution in the arcane world of ultra-precise clocks. And among them is a researcher who has trouble getting anywhere on time. "I do tend to be a little bit late ...

Since 1967, the cesium atomic clock has defined "one second" as the time it takes a cesium atom to vibrate 9,192,631,770 times. Before the atomic clock, the second was based on less precise ...

Physicists have developed a new ultra-precise atomic clock capable of measuring time down to a couple quadrillionths of a second.