On September 14, 2015, at 3:50 AM Central time, a tiny vibration shuddered down the 2.5-mile-long arms of a massive machine in Livingston, Louisiana. A fraction of a second later, a similar vibration ...

Physicists are no longer content to simply listen to ripples in spacetime. A new proposal sketches out how an exquisitely tuned laser experiment could, in principle, nudge gravitational waves ...

The loudest black hole collision ever recorded has just given Einstein’s theory of general relativity its hardest test so far. The event, dubbed GW250114, produced a record-smashing signal-to-noise ...