By replacing single atoms with an entangled pair of ions, physicists in Germany have demonstrated unprecedented stability in ...

Add Yahoo as a preferred source to see more of our stories on Google. You'd think that synchronizing the clocks across a fleet of modern servers is a solved problem, but it's actually quite a hard ...

From sundials that track the sun’s trek across the sky to hourglasses that mark the passage of sand between glass bulbs, humans have long wrestled with how best to measure time. This year, scientists ...

Today’s most advanced clocks keep time with an incredibly precise rhythm. But a new experiment suggests that clocks’ precision comes at a price: entropy. Entropy, or disorder, is created each time a ...