(koto_feja/Getty Images) A breakthrough in chronometry decades in the making could redefine the limits of how we keep time.

A clock built from thorium-229 has crossed an important line, from a long-discussed concept to a working device. The shift ...

Most clocks, from wristwatches to the systems that run GPS and the internet, work by tracking regular, repeating motions. To build a clock, you need something that ticks in a perfectly repeatable way.

Time feels familiar. It marks every moment of daily life, from the ticking of a wall clock to the changing numbers on a ...

But physicists have long dreamt of even better clocks that run on atomic nuclei, which are less sensitive to environmental ...

The world’s first nuclear clocks have ticked. A team of physicists has demonstrated a ...

Modern timekeeping relies on the accuracy of atomic clocks, which revolutionized timekeeping by using the quantum behavior of atoms to measure time. Discover how these incredibly precise clocks work, ...

Atomic clocks are established as the most precise timekeepers created. Atomic clocks work by deploying lasers to measure the vibrations of atoms (electromagnetic signals). By atoms oscillating at a ...

Two independent research teams have achieved a longstanding goal in physics: building a working nuclear clock. The devices, ...

(THE CONVERSATION) Most clocks, from wristwatches to the systems that run GPS and the internet, work by tracking regular, repeating motions. To build a clock, you need something that ticks in a ...