A record-breaking black hole smashup defies explanation.

The article discusses a groundbreaking collision of two black holes that challenges existing theories on the formation and merging of large black holes. The black holes involved had masses of approximately 140 and 100 times that of the sun, resulting in a newly formed black hole with a mass about 225 solar masses, the largest confirmed from such an event. Detected by the Laser Interferometer Gravitational-Wave Observatory (LIGO) in 2023, this merger raises questions about the formation mechanisms of black holes, particularly those in the mass range of 60 to 130 solar masses, where traditional formation theories do not apply. Researchers propose that these black holes may have originated from previous mergers or may have grown by accreting gas in the vicinity of a supermassive black hole, although the differing spin directions of the merging black holes complicate these explanations. [Extracted from the article]