Science ❯ Physics ❯ Particle Physics

Hypothetical Particles

Ultralight Bosons Weakly Interacting Massive Particles Axions

Twin Black-Hole Mergers Display Extreme Spins, Strengthen Einstein’s Theory, and Point to Second-Generation Origins

Peer-reviewed analyses turn two late-2024 gravitational-wave detections into some of the sharpest tests of general relativity to date.