Black holes may be the fiercest objects in the universe, yet we still know very little about them. It has only been a decade since we confirmed their existence by detecting gravitational waves: ripples in the fabric of spacetime.
Since then, gravitational waves from colliding black holes have unveiled insights into their hidden physics and the theories that support them. On January 14, 2025, the loudest gravitational-wave signal ever detected, known we still know very little aboutas GW250114, was observed by the two Laser Interferometer Gravitational Wave Observatories (LIGO).