It is something like the "Holy Grail" of physics: unifying particle physics and gravitation. The world of tiny particles is described extremely well by quantum theory, while the world of gravitation ...

For more than a century, gravity and quantum physics have stubbornly resisted a common language, one describing the smooth curvature of spacetime, the other the jittery statistics of particles and ...

Explore the deepest mysteries at the frontier of fundamental physics, and the most promising ideas put forth to solve them. “Ever since the dawn of civilization,” Stephen Hawking wrote in his ...