Nature, Published online: 24 June 2026; doi:10. 1038/s41586-026-10696-0 The observation of a direct wave after the merger of two black holes reveals signatures associated with the remnant black-hole horizon, establishing an observational channel to directly measure frame-dragging effects in black...
Source: [Nature](https://www.nature.com/articles/s41586-026-10696-0)