Gravitational waves from two merging black holes (shown in a simulation), spotted in 2015, revealed that the total surface area of the black holes doesn’t decrease when they merge.
Simulating Extreme Spacetimes project
Gravitational waves from two merging black holes (shown in a simulation), spotted in 2015, revealed that the total surface area of the black holes doesn’t decrease when they merge.
Simulating Extreme Spacetimes project