However, aluminum is tricky. The element is difficult to measure with lasers, as well as cool to absolute zero. But when ...

There's a new record holder for the most accurate clock in the world. Researchers at the National Institute of Standards and ...

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 ...

The best clocks now lose only a second every 300 million years – and those tiny time-keeping differences are changing our world. David Robson reports.

The NIST clocks are optical lattice clocks, which means they have an intense laser field that holds about 10,000 ytterbium atoms in place. Another laser excites the atoms, the movement of which is ...

A new study says world clocks need a "negative leap second" to stay accurate. Listen Share Mar 29, 2024 9:25am ( Here & Now / NPR) ...