This could change our understanding of how the cosmic titans collide.

Astronomers discover a 'lost world' of black hole mergers: 'It's the astronomical equivalent of uncovering an ancient civilization'

Source: space
Source Link: https://www.space.com/astronomy/black-holes/astronomers-discover-a-lost-world-of-black-hole-mergers-its-the-astronomical-equivalent-of-uncovering-an-ancient-civilization