The Digital Press

New analyses of gravitational wave data from black hole mergers show no evidence of "hair"—unique features beyond mass and spin—that would distinguish black holes, supporting Einstein’s theory of general relativity. Any extra quantum properties would have to exist extremely close to the event horizon, within 40 kilometers or less.

Why it matters: Confirming black holes have no hair supports Einstein’s century-old predictions and constrains alternative quantum gravity theories.

The big picture: The findings address the black hole information paradox, where quantum theory conflicts with classical descriptions of information loss.

The stakes: Detecting deviations could revolutionize physics by merging quantum theory and gravity, but current data tightly limits such deviations.

Commenters say: Readers discuss the electric charge aspect, debate scientific communication style, ponder observational limits, and reflect on the philosophical implications of indistinguishable black holes.