Curious about this. One possiblity is that matter in the black hole would be converted into energy, which might reduce the gravitational pull. Would it be possible that "dark matter' is created with anti-gravitational effects? Or maybe if enough mass is accumulated, combined with a high rate of spin, that the outer matter would pull the black hole appart? Another issue I don't understand is that I've read that gravity in a black hole is stronger than the strong force. I had the impression that the closer the objects, the more dominate the strong force would be. Last question, why isn't the nucleus of an atom like a mini-black hole? How closely packed are these?