'Lost World' of Gravitational Waves Reveals the Origins of Black Holes

The latest LIGO-Virgo-KAGRA catalog now includes about 390 gravitational-wave detections, mostly black hole mergers.

The larger sample lets researchers compare black hole masses, spins, and merger patterns across the population.

The data point to multiple formation channels, including isolated binary evolution, dense star clusters, and second-generation black hole mergers.

Record-setting events such as GW 250114 and GW 240615dg help sharpen tests of black hole formation and evolution.

A bigger catalog also strengthens gravitational-wave astronomy’s role in cosmology measurements.