The traditional standard model description of a black hole says that they suck in everything around them, (even light) and that nothing except a small amount of radiation (Hawking radiation) is able to escape, leading them to eventually "evaporate", which causes a major issue called the "information paradox". If we know that energy has to be conserved (that is, it can't ever be destroyed, that it only change state) then where does all the energy (mass) that falls into a black hole go?