Modern navigation systems rely heavily on satellite timing, and that dependence has become a growing vulnerability. GPS ...

In 2008, a team of UCLA-led scientists proposed a scheme to use a laser to excite the nucleus of thorium atoms to realize extremely accurate, portable clocks. Last year, they realized this ...

Physicists are exploring thorium-229’s unique properties to create a nuclear clock so precise it could detect the faintest hints of dark matter. Recent measurement advances may allow scientists to ...

The Doomsday Clock currently sits at 89 seconds to midnight in 2025, marking humanity's closest approach to global ...

For all our telescopes and colliders, dark matter has remained an elusive ghost for the better part of a century. It outweighs everything we see by a factor of five, yet it slips past every detector ...

Scientists have used laser-excited thorium-229 to probe for ultralight dark matter, even without a fully built nuclear clock. Thorium-229’s unique nuclear transition offers up to a billion times more ...

The National Institute of Standards and Technology recently warned that an atomic clock device installed at its Boulder campus had failed due to a prolonged power ...

Researchers develop a method to count thorium-229 nuclear ticks, paving the way for high-precision nuclear clocks and sensors.

Using a technique inspired by old-fashioned jewelry making, a UCLA-led research team has discovered how to build the core of ...