Time has always been defined by the vibrations of cesium atoms. But as the limits of precision are pushed further by modern physics, scientists are now preparing to rewrite the rules. Last month, a ...

EUROPE — Every clock in your house probably tells a slightly different time. Now picture those clocks as the most precise instruments humanity has ever built, so accurate that they wouldn’t lose or ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Scientists have taken a major step toward the ambitious global goal ...