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A fifth dimension could fit into general relativity after all—by using this one weird trick.

Mathematicians are challenging the idea that dark energy is responsible for the accelerating expansion of the universe. In a ...

Einstein's theory of gravity — general relativity — has been very successful for more than a century. However, it has theoretical shortcomings. This is not surprising: the theory predicts its own ...

Black holes are usually framed as the ultimate dead ends of the universe, but a new mathematical proposal suggests they might instead be raw material for building shortcuts through spacetime. In this ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Albert Einstein's theory of general relativity—which explains gravity ...

A new study just added an interesting twist to the complicated history of the physics theory.

Black holes, regions in space where gravity is so strong that nothing can escape, have been widely studied over the past ...