390 gravitational wave detections reveal hidden population of black holes
Summary
A new gravitational wave catalog adds 161 black hole mergers, bringing the total to 390 detections. The data include an exceptionally clear signal, a sharply localized merger, and stronger indications that some black holes formed through earlier mergers.
Why it matters
High-volume gravitational wave data turns black hole mergers into a statistical tool for astrophysics, not just headline events.