: : : In reply to Joe Postma : I don't know how long you've been studying blackholes but adding matter to the event horizon will only feed the singularity, thus making the infinite speck of a singularity in a blackhole more "tightly squeezed" Eventually the force will suck the center into a negative density and the calculation to it's density will be a negative equation. The opposite force is what causes the matter to emit itself. That is how a blackhole evaporates. Actually I can't mentally comprehend the equations mentioned above but in the books its correct. CLARIFY!!!!!!!

Hawking Radiation works in a different way. Due to Heisenbergs Uncertainty Principle it is possible to create an electron/positron pair spontaneously, called virtual particles. Normally these simply annhilate again so we never this happen. If such a pair is created right at the event horizon of the black hole one particle crosses over into the Event horizon the other could escape.

What we see is matter being emitted from the Black Hole. Now, this matter has a positive "energy density", even if a anti-particle so the point at which the virtual particles come from must have a "negative" energy density in relation to space around it.

I hope I clarified that one at least.