What started as a hobby became a full-blown business for Harold MacVittie more than a decade ago. His Chapin clock shop is still ticking.

Nuclear clocks are a technology researchers have been working toward for decades. New research in theoretical physics brings them closer to reality.

You'd think that synchronizing the clocks across a fleet of modern servers is a solved problem, but it's actually quite a hard challenge to solve, especially if you want to get to nanosecond accuracy.

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 ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Picture a clock ...

For decades, atomic clocks have provided the most stable means of timekeeping. They measure time by oscillating in step with ...