Most accurate clock ever can tick for 40 billion years without error

The most accurate clock on the earth will lose lower than 1 second each 40 billion years, or round thrice the present age of the universe. While we have now no direct want for such excessive timekeeping, the clock might assist investigations in a number of areas of physics, together with detecting darkish matter.

At the core of the clock, constructed by Alexander Aeppli on the University of Colorado Boulder and his colleagues, are about…