"The singularity is the most mysterious and problematic part of a black hole. It's where our concepts of space and time ...

It may be the world’s most famous equation, but what does E=mc2 actually mean? Shortly after completing his paper on special relativity, in 1905, Einstein realized his equations applied to more ...

During the latter part of the 20th century, string theory was put forward as a unifying theory of physics foundations. String ...

This general-relativity-based operator leads to a new "entropic action," and to modified Einstein equations. At low energies and in regions of space where there is little curvature, and thus ...

Einstein believed that black holes didn't really exist. But they do: that much we know. We don't know much else about them.

Without relativity, changes in electromagnetic ... is a direct consequence of Einstein's famous equation E=mc². This equation explains the process of nuclear fusion, where hydrogen atoms combine ...

The behavior of spacetime is described by Einstein's equation (i.e. Einstein's field equations) from General Relativity. To ...

Physicists have taken a bold step beyond Einstein's special theory of relativity, proposing an expansion of special ...

Electrodynamics (electricity and magnetism) is governed by Maxwell's equations and the Lorentz force law, but that left it a little broken. It would take Albert Einstein inventing special relativity ...