KAGRA

When two black holes collide, they release gravitational waves that allow scientists to determine their mass and spin. In January 2025, LIGO detected GW250114, the clearest signal yet of a black hole merger, providing new insights into these mysterious cosmic giants. Credit: Maggie Chiang for Simons Foundation

Hawking was right: New data confirms black holes never shrink

The sharpest and brightest gravitational signal ever measured, GW250114, allows the LIGO–Virgo–KAGRA collaboration to test Hawking's surface theorem and Einstein's prediction with unprecedented precision. Black holes "ring" after
Two massive black holes have collided in deep space, creating a final monster that defies current theories. Scientists say it's the most massive, fastest-spinning merger ever discovered.

LIGO Detects Gravitational Waves from Extreme Black Hole Merger *Pushing the Limits of Einstein's Theory of Relativity

A collision between two massive black holes creates a body that rotates at dizzying speeds and contradicts standard models – possibly resulting from previous mergers