The disconnect between relativity and the quantum world. Einstein’s theory of general relativity explains how gravity works. It says that massive objects like planets, stars, or galaxies bend ...

A new quantum recipe for black holes could be the first step toward a theory of "quantum gravity", the "holy grail" of ...

At cosmological scales, Albert Einstein’s theory of general relativity has given scientists an immensely accurate blueprint ...

Discover how Einstein’s theory of special relativity reshaped physics by linking space, time, mass, and energy in a universe governed by the speed of light.

Murray said he preferred the special relativity equations to the more complicated formulas in Einstein's later theory. "I could never follow the maths of general relativity," he said. Euler's equation ...

Earlier this year, new research suggested a potential solution to one of the most troubling aspects of modern physics — that "singularities" seem to exist at the hearts of black holes. The idea of the ...

New tweaks to Einstein's equations of general relativity could finally do away with them, and explain what truly lies at the heart of a black hole. Comments ( 0 ) () ...

The relationship between quantum mechanics and classical physics has baffled scientists for decades. In the quantum world, particles can exist in multiple states at once—a phenomenon known as ...

Dirac equation: A relativistic wave equation that describes spin-½ particles and integrates the principles of quantum mechanics with special relativity. Klein–Gordon equation: A relativistic ...

The interplay between quantum coherence, entanglement, and the relativistic treatment of spin offers critical insights into phenomena ranging from atomic systems to high-energy particle physics.