The discovery of gravitational waves was the crowning glory of Einstein's relativity. They might now have provided the first hint of something to scupper it

If gravitational waves – ripples in space time – have a handedness, primordial particles could interact with them to form a dark matter superfluid that spreads through the cosmos

The discovery of gravitational waves was the crowning glory of Einstein's relativity. They might now have provided the first hint of something to scupper it

Astronomers' newfound ability to see the same cosmic events in light, particles and gravitational waves—a synthesis called multimessenger astronomy—gives them a fuller picture of some of...