A new nuclear clock, which uses the low-energy transition in the nucleus of a thorium-229 atom, could help detect the most elusive particle in the universe.

Scientists are close to creating a nuclear clock—an ultra-accurate clock that uses a low-energy transition in the nucleus of a thorium-229 atom to keep time. Electrical interference makes atomic ...

First introduced in the 1950s, atomic clocks replaced how scientists previously measured the length of a day by tracking the Earth's rotation and the position of the sun.

Until 2020, the shortest day ever recorded by atomic clocks was 1.05 milliseconds short, meaning that Earth completed one daily rotation in 1.05 milliseconds less than the expected 86,400 seconds.

Yoshito Matsushige’s photographs Hiroshima’s destruction are among the most harrowing visual records of the nuclear age.

Siegfried Hecker, former director of the Los Alamos National Laboratory, expresses concern that, 80 years after the bombings of Hiroshima and Nagasaki, that the world is on the wrong path—instead of ...

World marks 80 years since US dropped atomic bomb on Japan as global powers still trade nuclear threats Louise Delmotte/AP via CNN Newsource A visitor walks past the Atomic Bomb Dome in Hiroshima ...

World marks 80 years since US dropped atomic bomb on Japan as global powers still trade nuclear threats 0:00 / 0:00 By CNN Newsource Published August 5, 2025 4:33 pm ...

You won’t notice the sunrise arrive 1.33 milliseconds sooner, but to precision atomic clocks, quasar‐referenced astronomical measurements, it will be obvious.

They may also set themselves according to atomic clocks. So, enjoy the long days of sunshine while you can. Clocks will still be falling back on Nov. 2. Hey, at least there will be more time to ...

Cade Horton keeps shutting down opposing lineups; Cubs keep sharp eye on growing innings count The rookie right-hander kept the Orioles off the scoreboard on a blustery day at Wrigley Field, but ...

Hiroshi, her second son, was born in 1948, three years after the U.S. dropped an atomic bomb on Nagasaki. As a survivor of the bombing, Nakamura had long feared she might pass on health problems ...