A technological innovation could revolutionize the precision of navigation systems. A tiny device, shaped like a comb, promises to deliver unparalleled accuracy in the field ...

Atomic clocks are the basis upon which a second is defined. But there is a new kid on the block, the optical clock, which ...

A revolutionary timekeeping breakthrough could be on the horizon as scientists explore the thorium-229 nuclear optical clock, ...

Scientists have developed a "microcomb chip" — a 5 millimeter (0.2 inches) wide computer chip equipped with tiny teeth like those on a comb — that could make optical atomic clocks, the most ...

The size, power, and other metrics of a latest-generation chip-scale atomic clock.