Most atomic clocks sold in the U.S. have every American time zone setting, but it's good to double check before buying one. You'll also want to consider what other features you need in an alarm ...

Which atomic clocks are best? The first time zone, Greenwich Mean Time, was established in the late 1600s to assist sailors before the invention of the train and railway in the mid-1800s expanded ...

Which atomic clocks are best? The first time zone, Greenwich Mean Time, was established in the late 1600s to assist sailors before the invention of the train and railway in the mid-1800s expanded ...

Which atomic clocks are best? The first time zone, Greenwich Mean Time, was established in the late 1600s to assist sailors before the invention of the train and railway in the mid-1800s expanded ...

Which atomic clocks are best? The first time zone, Greenwich Mean Time, was established in the late 1600s to assist sailors before the invention of the train and railway in the mid-1800s expanded ...

Time triangle: illustration of how the ytterbium (Yb), strontium (Sr) and aluminium-magnesium (Al+/Mg+) atomic clocks were connected. (Courtesy: N Hanacek/NIST) The time kept by three of the world’s ...

Not all atomic clocks can be used anywhere in the world as some only have compatibility with certain time zones. Using one of these outside a supported time zone could mean an inaccurate time ...

Nuclear clocks might soon rival the best atomic ones as supremely accurate timekeepers — a testament to the value of both competition and cooperation in research. Nuclear clocks might soon rival ...

Atomic clocks work by using a laser to bounce the electrons in an atom at a given frequency, while nuclear clocks would theoretically do the same for atomic nuclei, and we are a step closer to ...

Correction 10 May 2024 Best ever clocks: breakthrough paves way for ultra-precise ‘nuclear’ timekeepers A clock based on energy shifts in atomic nuclei could transform fundamental-physics ...

One of the biggest challenges in modern physics is uniting quantum mechanics and general relativity. A new experiment may ...

The best clocks now lose only a second every 300 million years – and those tiny time-keeping differences are changing our world. David Robson reports.