Researchers have found a suspected clump of dark matter lurking within the luminous halo of a well-known "Einstein ring." The ...

The story begins with the black hole information paradox. According to relativity, anything that falls into a black hole is ...

A team of astronomers have found a mysterious object in the distant universe that could be dark matter or an inactive smaller ...

What if the universe remembers? A bold new framework proposes that spacetime acts as a quantum memory. For over a hundred ...

The universe rarely fails to amaze. One of its latest surprises—nicknamed the “Einstein zig-zag”—reveals a stunning arrangement of galaxies and a distant quasar. Together, they produce a gravitational ...

The gravitational lensing that causes this rare phenomenon cannot be explained solely by looking at observable ...

To understand gravity, Einstein had to rethink space and time as a single connected fabric. He showed that mass bends this fabric, guiding how everything moves. NOVA is available to stream on pbs.org ...

From early experiments with lanterns to Einstein’s revelations about space and time, the speed of light has proven to be far more than a number: it’s the cosmic constant that defines reality.

The signal, seen for just 0.1 seconds, could be a sign of "another universe and connected to our universe through a throat" ...

The faster you move, the stranger time becomes. By imagining how light travels to two people moving at different speeds, Einstein showed that time isn’t absolute. His thought experiment revealed that ...

A Cornell physicist calculated new data from dark energy reviews, indicating the end of the universe within a few billion ...