Doomsday Clock, Atomic Scientists
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The new Doomsday Clock time has been set by the Bulletin of the Atomic Scientists. Here’s what it means.
For many years, cesium atomic clocks have been reliably keeping time around the world. But the future belongs to even more accurate clocks: optical atomic clocks. In a few years' time, they could change the definition of the base unit second in the International System of Units (SI).