Albert Einstein's humorous quote offers a profound lesson for children: never stop questioning or learning. The universe's ...

Do you know what connects Edwin Hubble’s theory for an expanding universe and Albert Einstein’s cosmological constant? The ...

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

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

Astronomers have finally watched a black hole do something Albert Einstein only described on paper: twist the very fabric of spacetime around it. The new observations capture a spinning monster ...

Why is the expansion of our Universe accelerating? Twenty-five years after its discovery, this phenomenon remains one of the greatest scientific mysteries. Solving it involves testing the fundamental ...

The cosmos is a unique laboratory for testing the laws of physics, in particular those of Euler and Einstein. Euler described the movements of celestial objects, while Einstein described the way in ...

In July 1930, Rabindranath Tagore visited Albert Einstein in Caputh, near Berlin, at his summerhouse. The meeting of the two ...

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 ...