"The earth isn't going to run out of heat"<br><b>Laughs in the heat death of the universe</b>,(reply>), @Titanium Rain @Dagan Schoen No you wouldn't. Energy isn't conserved on cosmological scales. If the universe has a positive cosmological constant, and we think it does, then the heat density of the universe should approach this constant as its volume diverges, meaning the total heat increases.,(reply>), @DiamondStrings The will die before the heat death but they will be the last thing to die. We don't have to know what goes on in them to use them as energy sources.,(reply>), @Rymeths black holes  will die before a heat death. Also there would be now way of knowing what happens in a black hole, and it would most likely just kill you,(reply>), @DiamondStrings I mean the black holes that will not die out as long as they are "fed" something else in return. Also hawking radiation is also something theoretical (though I also think it's fair to assume it exists). Black holes will also die far later than all kinds of sun's.,(reply>), @Rymeths you mean the black holes that will die out from Hawking radiation? You might say this is theoretical, but so is everything in a kurgezat video