The accelerating expansion of the universe is usually explained by an invisible force known as dark energy. But a new study ...

A variation on the theory of quantum gravity — the unification of quantum mechanics and Einstein's general relativity — could help solve one of the biggest puzzles in cosmology, new research suggests.

Quantum theory and Einstein's theory of general relativity are two of the greatest successes in modern physics. Each works ...

In a cavernous lab in eastern China, a metal giant is quietly rewriting the rules of gravity. The country has brought online ...

A new theory suggests that the unification between quantum physics and general relativity has eluded scientists for 100 years because huge "fluctuations" in space and time mean that gravity won't play ...