Trying to solve quantum gravity is frustrating. We have made tremendous progress in quantum theory, but it seems that every ...

A 10-year effort to measure gravity, a fundamental force in the universe, has failed to come up with a conclusive answer.

King Charles III's first visit to the United States as a British monarch is drawing fresh comparisons to Queen Elizabeth II's historic trips — with royal experts noting that he appears to be charting ...

Astronomers are rethinking one of cosmology’s biggest mysteries: dark energy. New findings show that evolving dark energy models, tied to ultra-light axion particles, may better fit the universe’s ...