The accelerating expansion of the Universe, first observed in 1998, remains one of the most profound mysteries in modern ...

Researchers studied how the universe’s structure changed over time. They found that the universe is less clumpy than expected ...

A Precision Test of General Relativity. While Einstein’s famous theory of general relativity accurately describes the motion of celestial bodies in our solar system, less is kno ...

"And it just refuses to yield." We know what gravity does. It keeps us on our feet. It keeps the Earth orbiting around the Sun. And thanks to Einstein's theory of gravity, we know enough to map ...

To express his ideas mathematically, Einstein needed new math : Riemannian Geometry: In 1912, Einstein’s friend Marcel ...

In an article published in Physical Review Letters on Thursday, scientists carried out an innovative study testing the ...

Albert Einstein’s theory of gravity, known as general relativity, is incomplete. Physics Nobel laureate Roger Penrose, showed that when matter collapses under its own gravity, it forms a “singularity” ...

Gravity is fictitious and unnecessary. Here, we show that universal expansion naturally manifests as “gravity”. Methods: A theory is presented that postulates a natural expansion of the observer’s ...

Marcus Chown’s “A Crack in Everything” is a journey through space and time with the people studying one of the most enigmatic ...

The size and spin of black holes can reveal how and where they were born, and gravitational waves offer a way to decode this ...