A fluorite crystal containing atoms of the radioactive element thorium-229. It was used to precisely measure the absorption spectrum of atomic nuclei at the National Metrology Institute of Germany ...

In a groundbreaking study, physicists have developed a new method for detecting dark matter, an invisible substance believed to account for around 80% of the universe’s mass. Using thorium-229, a ...

The risk of nuclear war and the threat of climate change have caused the Bulletin of the Atomic Scientists to move the Doomsday Clock 30 seconds closer to catastrophe to two minutes to midnight. 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 ...

CHICAGO -- The Doomsday Clock has been set to its closest time to midnight in its history, the Bulletin of the Atomic Scientists announced Tuesday. The clock has now been set to 90 seconds to midnight ...

Optical lattice clocks are emerging timekeeping devices based on tens of thousands of ultracold atoms trapped in an optical ...

The anti-nuclear power movement in the United States peaked in 1979, with widespread protests, the “No Nukes” concert in New York City, and the release of The China Syndrome, the gripping film about a ...

It feels like we’re living in unprecedented times. Political divisions rack the U.S. and the world. The war between Ukraine and Russia has brought unforeseen advances in drone warfare. The foreign ...

For nearly a century, scientists around the world have been searching for dark matter—an invisible substance believed to make up about 80% of the universe's mass and needed to explain a variety of ...