An illustration shows a single black hole spliting into two (Image credit: Robert Lea)

Scientists have long known that when two black holes collide, they merge to create a more massive black hole. These events are so violent that they set the very fabric of space ringing with ripples called gravitational waves.

Now, new research suggests that the opposite may happen, too: single

black holes may be able to split in two. But this can only happen if that progenitor black hole is spinning at maximum possible speed. That speed prevents the black holes from immediately falling back on each other.

There are physical laws in place that would usually prevent black holes from splitting in two; the team behind this research investigated whether there are conditions in which these laws can be temporarily bypassed.

One of the key aspects of physics that prevents black holes from bifurcating comes from thermodynamics .…