An international team of physicists has detected the most massive black hole merger ever recorded, identified as event GW231123, through gravitational wave observations. The merger involved two black holes with masses approximately 100 and 140 times that of the sun, resulting in a single rapidly spinning black hole about 225 times the mass of the sun. This event occurred roughly 10 billion light-years away and was detected by the LIGO observatory in the United States, in collaboration with the Virgo detector in Italy and KAGRA in Japan. The energy released during the collision is estimated at around 3 × 10⁴⁸ joules, an amount that would take the sun about 200 trillion years to emit. The discovery challenges existing theoretical models of black hole formation, as the merged black hole falls into a mass range previously considered forbidden by current astrophysical theories. Scientists suspect that the original black holes themselves may have formed from earlier mergers, indicating a complex evolutionary history. The findings have been presented at international conferences and are expected to prompt a reevaluation of black hole formation and growth mechanisms.