A new experiment involving a network of entangled atomic clocks could finally help us test how quantum mechanics fits with ...

Scientists propose using quantum-entangled clocks to test how gravity affects quantum mechanics in curved spacetime.

The record-breaking achievement could lead to practical, utility-scale quantum computers that are both smaller and faster.

If, like me, you can't go a day without making sure your watch is synced to the second, you'll be delighted to learn that a new atomic clock has broken the record with an accuracy of 5.5 x 10⁻¹⁹ – ...

Possibly originating with the English poet Geoffrey Chaucer's "time and tide wait for no man," the idea that time waits for ...

Key TakeawaysScientists have used laser-excited thorium-229 to probe for ultralight dark matter, even without a fully built ...

Over the last several years, researchers have shown that it is possible to design clocks 1,000 times more precise than the atomic clocks that the original definition of the second is based on ...

The atomic clock used in modern timekeeping uses lasers to manipulate atoms of cesium-133 along a frigid shaft. Then microwaves blast into a huddled bundle of these atoms, and triggers their ...

The atomic clock is an optical lattice that controls strontium atoms. Photo: K. Palubicki/NIST New clock just dropped, but it’ll only drop a second every 30 billion years while in operation.

Atomic scientists on Tuesday moved their "Doomsday Clock" closer to midnight than ever before, citing Russian nuclear threats amid its invasion of Ukraine, tensions in other world hot spots ...

With decades of national security experience, Jill Hruby joins the Bulletin’s Science and Security Board—the group that sets the Doomsday Clock—to help confront today’s most urgent man-made threats.