Now a Japanese company has commercialized one approach—an optical-lattice clock it claims is the most accurate on the market.

With life’s busy schedule, keeping track of time without a clock is challenging. We’re so dependent on this device that even when we go to sleep, we need an alarm clock to remind us to wake up.

The best sunrise alarm clocks help you wake up gently and start your day energized. See our top picks from Hatch, Philips, ...

Tomas shares his Plato clock ✓ A lovely flip clock from more than a century ago ✓ And it's still ticking strong! ✓ Read about ...

But designers of large devices, of complex SoCs and of devices using multiple ... is the clock network needing many additional buffers to keep sharp clock edges but at the same time causing delays and ...

ACES will gather ultra-precise data across at least ten observation windows, each lasting about 25 days during the ...