atomic clock
Scientists Quantum Entangled Atomic Clocks 6 Feet Apart to Probe Fabric of Reality
Entangling two hyper-precise instruments at a distance will let scientists probe dark matter and space-time.
NASA Has Turned on a Deep Space GPS
The miniature atomic clock is a big step toward self-driving deep space probes.
The Physicist Building the World’s Most Precise Clock
Advanced timekeeping could help unify quantum and gravitational physics, predict earthquakes, and navigate in deep space.
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New and Improved Atomic Clocks Mean It's Time to Update Time
The latest system trims timekeeping errors to less 200 picoseconds over 25 days.
The New Atomic Clock Will Be Accurate for 15 Billion Years
That's almost the age of the universe itself.
Why 2015's 'Leap Second' Should Be the World's Last
Many scientists and countries feel it's more trouble than it's worth.
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