- Second-Hand Black Holes May Be Hiding Across the Universe. Researchers Now Have a Way to Spot Them ZME Science
- Gravitational waves reveal hidden populations within black hole mergers Phys.org
- Evidence Mounts for Hierarchical Black Hole Mergers American Physical Society
- Scientists Say Some Black Holes Are Born From Other Black Holes Gizmodo
- Many black holes may not be born the way we thought Tech Explorist