General relativity, formulated by Albert Einstein, describes gravity as the curvature of spacetime caused by mass. In contrast, quantum gravity aims to reconcile the principles of quantum ...

After thinking about the problems for 10 years, he published the general theory of relativity. In it, he suggested that gravity is not a force, as Newton had believed, but the result of a ...

Scientific breakthroughs often stem from the persistent pursuit of understanding complex phenomena. From the nanoscale ...

On 25 November 1915, Albert Einstein presented his general theory of relativity at the Prussian Academy of Sciences. This theory is still considered to be the most important idea in modern physics.

Quantum gravity is a field of theoretical physics that seeks to unify the principles of quantum mechanics with general relativity, the framework that describes gravity. This area of research is ...

But why do we care? Black holes are cast-iron predictions of general relativity, Einstein’s peerless theory of gravity, and yet they stretch it to breaking point. General relativity says that ...

That wasn't just wifely pride. Years before Hubble detected cosmic expansion, Einstein had fashioned a theory, general relativity, that could explain it. In studies of the cosmos, it all goes back ...

but acting more like Albert Einstein predicted in his 1915 general theory of relativity. Cosmologists since 1998 have theorized that a mysterious invisible force dubbed dark energy was pushing the ...

When around 1916 Einstein first used general relativity to build a cosmic model, he followed the orthodoxy of the day and assumed that the universe was static: that is, neither expanding nor ...