Einstein has long been the go-to guy when you think “genius,” but he was once simply the adored baby of doting parents. That’s where Jennifer Berne’s new picture-book biography begins, and ...

Einstein's fascination with light, considered quirky at the time, would lead him down the path to a brand new theory of physics.

Einstein was enthralled by light. Even as a teenager he pondered its properties. At 16, he imagined what it would be like to chase, catch up with, and ride on a light beam. When he started ...

A technician works on one of LIGO's optics. At each observatory, the 2 1/2-mile long L-shaped LIGO interferometer uses laser light split into two beams that travel back and forth down the arms.

As a 16-year-old boy, Albert Einstein imagined chasing after a beam of light in the vacuum of space. He mused on that vision for years, turning it over in his mind, asking questions about the ...

Alan Hirshfeld reviews “Seven Brief Lessons on Physics” by Carlo Rovelli and “The Universe in Your Hand: A Journey Through Space, Time, and Beyond” by Christophe Galfard.

For decades, he hid his time-travel obsession. Now, he is challenging the assumptions that underpin our universe.

Recent physics studies have found that light can sometimes flow in unexpected ways, behaving like a so-called "superfluid." ...

Researchers at the universities of Bonn and Cologne in Germany have developed a new way of splitting photon wavepackets that involves cooling them down to a Bose–Einstein condensate (BEC) in a ...

C, the cosmic speed limit, is the fastest anything in the universe can go. But how fast is that? And how do we know?