Einstein’s claim that the speed of light is constant has survived more than a century of scrutiny—but scientists are still daring to test it. Some theories of quantum gravity suggest light might ...

Einstein was a great thinker who made plenty of mistakes—errors that sometimes led to more meaningful discoveries in physics, long after his passing. Reading time 5 minutes Albert Einstein is ...

In an effort to bring together the domains of gravity and quantum theory, Albert Einstein and Nathan Rosen proposed a ...

Quote of the day by Albert Einstein highlights thinking beyond limits. The quote connects with Einsteins life, education, and ...

A famous aphorism by Albert Einstein is carved in stone, in the original German, over the mantelpiece of one of the common rooms at Princeton. When I was a graduate student I would sometimes take ...

The constancy of the speed of light is a pillar of modern physics, but questions persist about its absolute universality. Advanced theories, seeking to unify general relativity and quantum mechanics, ...

As Albert Einstein wrote elegantly about our experience of time and space, he also devoted his days to the process of social transformation: the question of how one world becomes another. He was ...

Wormholes are often imagined as tunnels through space or time—shortcuts across the universe. But this image rests on a ...

Discover everything about Shrinivas Kulkarni, the 2026 RAS Gold Medalist. Learn about his groundbreaking work at Caltech, his ...