Einstein’s Theory of General Relativity is currently our best approximation of how the universe ticks. But there are holes.

110 years ago today, Albert Einstein published his General Theory of Relativity, which redefined the relationship between matter and gravity. Suddenly, our mysterious universe made a little more sense ...

The accelerating expansion of the universe is usually explained by an invisible force known as dark energy. But a new study ...

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 ...

General Relativity, Einstein’s seminal theory of gravitation, remains a pillar of modern physics by describing gravity as the curvature of spacetime. Nonetheless, persistent questions—ranging from the ...

Quantum theory and Einstein's theory of general relativity are two of the greatest successes in modern physics. Each works ...

The rapid acceleration of the universe’s expansion continues to challenge our understanding of fundamental physics. Why the ...

For over a century, quantum mechanics and Einstein’s general relativity have stood as the cornerstones of modern physics, yet their unification remains one of science’s greatest challenges. Now, ...

In October 2015, a young mathematician named Clemens Sämann was flying home to Austria from a conference in Turin, Italy, when he had a chance encounter. He found himself seated beside Michael ...

Michelson's interference experiment / by H.A. Lorentz -- Electromagnetic phenomena in a system moving with any velocity less than that of light / by H.A. Lorentz -- On the electrodynamics of moving ...

Why the universe is expanding faster and faster remains one of the biggest open questions in physics. Current theories cannot ...

Scientific breakthroughs often stem from the persistent pursuit of understanding complex phenomena. From the nanoscale intricacies of molecular diffusion in advanced materials to the vast cosmic ...