However, aluminum is tricky. The element is difficult to measure with lasers, as well as cool to absolute zero. But when ...

There's a new record holder for the most accurate clock in the world. Researchers at the National Institute of Standards and ...

The laser beam traveled 3.6 kilometers (over 2 miles) via fiber optic links to NIST, where a frequency comb (acting as a “ruler for light”) allowed the aluminum ion clock’s laser to adopt its superior ...

For nearly a century, scientists around the world have been searching for dark matter—an invisible substance believed to make ...