They are all related to Albert Einstein's Theory of Relativity. How many of us, though, can actually explain any of it? This year, Einstein's theory turns 100 years old.

For over 100 years, two theories have shaped our understanding of the universe: quantum mechanics and Einstein’s general relativity. One explains the tiny world of particles; the other describes ...

E=mc², Einstein’s most famous equation, has been etched into the minds of millions, but what does it really mean? Few understand the profound implications hidden within this iconic formula. This video ...

Quantum entanglement, a bewildering phenomenon where particles become interconnected regardless of the distance separating ...

Addressing a controversy first raised around 1910, two physicists have performed experiments with the aid of an engineer that validate anew the special theory of relativity’s limitations on the ...

Generations of researchers have tried to create a quantum theory of gravity, and their work has produced sophisticated ...

The LIGO observatories confirmed Einstein’s theory of general relativity when they made the first ever physical detection of ...

He shared the Nobel Prize in Physics for his work on gravitational waves, which helped confirm Einstein’s general theory of ...

The accelerating expansion of the universe could be explained by modifying general relativity so that gravity has mass – or so thinks a small group of physicists. Matthew Francis reports What lies ...