Atomic clocks are the basis upon which a second is defined. But there is a new kid on the block, the optical clock, which ...

Daily electronic screen use before sleep was associated with 48 fewer minutes of sleep each week. As compared to those with ...

Waking up tired or wired? Your circadian rhythm could be off. Reset your internal clock with science-backed habits for deeper ...

Atomic clocks have long been the gold standard for measuring time and frequency. Among them, optical clocks—using atoms like ...