A new atomic clock is one of the world’s best timekeepers, researchers say — and after years of development, the “fountain”-style clock is now in use helping keep official U.S. time. Known ...

An atomic clock measured how general relativity warps time across a millimeter. ... the setup could be used for that in the future. A cloud of strontium atoms (glowing blue dot at center) ...

If an atomic clock fell out of sync with a nuclear clock, for example, some change in the underlying physics might be responsible. Only time will tell. Curious about the world?

Optics setup for a strontium magneto-optical-trap, part of the Kokowitz group’s strontium optical atomic clock. The precision of atomic clocks is improving at a “mind-boggling” pace, Ye says.

Picture a clock ticking so steadily that it doesn’t lose a second, even after running for 1 billion years. Scientists are now closer than ever to realizing that level of timekeeping precision ...

Many modern atomic clocks use oscillations of strontium atoms rather than cesium to measure time; the most precise of these is accurate to within 1/15,000,000,000 of a second. This means that ...

Simple setup: The iodine vapour cells used in Vector Atomic's portable optical atomic clock. (Courtesy: Vector Atomic) Atoms are the world’s most precise timekeepers – so much so that the second is ...

Atomic scientists on Tuesday kept their "Doomsday Clock" set as close to midnight as ever before, citing Russia's actions on nuclear weapons amid its invasion of Ukraine, nuclear-armed Israel's ...

Atomic scientists moved their "Doomsday Clock" closer to midnight than ever before, citing Russian nuclear threats amid its invasion of Ukraine and other factors underlying the risks of global ...