Direct-wave signal edges closer to unveiling a black hole’s event horizon
A new, unusually clear gravitational-wave signal from a black-hole merger (GW250114) may carry the long-theorized direct-wave signature, offering a rare observational probe of the region near a black hole’s event horizon and enabling measurements of horizon rotation; if confirmed, this could open a new way to test general relativity and study near-horizon physics, though additional data and verification are needed.