One night in 1970, Stephen Hawking was tossing and turning in bed when an idea came to him.
He came to the conclusion that black holes, which he had previously considered almost immortal, can slowly lose mass and gradually evaporate, disappearing in a flash of gamma rays. The death of a black hole will entail a powerful explosion with an energy release equal to that which would be released during the explosion of 5 trillion tons of TNT. Everything that was absorbed by the black hole during its existence will be "processed" into pure energy and splashed out into the surrounding space in the form of radiation.
The problem is that there was no way to test this idea back then. Black holes live too long for us to observe the death of one of them today. But Hawking's research on black holes is now embedded in theoretical physics.
If he only could provide evidence, he would probably get a prize. But unfortunately black holes live for too long.