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

A collision observed between two black holes, each more massive than a hundred suns, is the largest merger of its kind ever recorded, according to new research.

What occurs when two black holes, each greater than a hundred Suns, smash into each other in the shadows past our galaxy? In a brief tenth of a second, the Laser Interferometer Gravitational-wave Observatory (LIGO) in Livingston,