Using ripples in space-time predicted by Einstein, a team of researchers has detected a cosmic merger of unprecedented proportions.

The largest black hole collision ever recorded has scientists' jaws on the floor — and scratching their heads.

What occurs when the universe plays a cosmic curveball, breaking down long-standing assumptions about how black holes form? On 23 November 2023, the LIGO-Virgo-KAGRA Collaboration observed a gravitational wave signal GW231123 that would become an instant classic in the field of astrophysics.