Science
Did LIGO Detect a Primordial Black Hole? Mysterious Signal Could Offer a New Clue to Dark Matter
A highly unusual gravitational-wave signal has raised an extraordinary possibility: scientists may have detected a black hole unlike any known object produced by a dying star. The candidate event, designated S251112cm, was recorded on November 12, 2025, by the international network of gravitational-wave observatories associated with LIGO, Virgo,