Ok so awhile back I was thinking about Black Holes, and I've started to wonder the possiblity if Black Holes are like universal recycling bins? (Please note my physics knowledge is not that of some one of a degree I'm only taking what I've learned from books I've read) A lot of people like to argue that the second law of thermodynamics shows us the universe cant be 20 billion years old...because the universe Would Have reached a state of entropy. Now lets take newtons laws and we know that energy can't be destroyed. We also know(the most obvious) e=mc2. So what I'm getting to is when a black hole engulfs a star does it stop there? It doesnt. A black hole becomes more massive with each object it takes in. Making it even denser each time..We can look at the center of our own galaxy and see theres a massive black hole. Theres also black holes in the center of other galaxies, eventually the black hole will consume our galaxy, But what next will the black hole stop at our own galaxy(sadly i lack the mathmatical skills to calculate a black holes desnsity) It would be extremely dense and start to pull in other galaxies. All that energy going in the black hole has to go some where..and space has to have its own limits(right?) So when space can no longer hold the amount of energy a black hole has...Im predicting that once a black hole becomes so massive it will not be able to support itself no longer and explode...the explosion of course would spread matter all out again recycling energy creating new universes...the explosion would obviously be a big bang. once again...if im entirely wrong with my information please post it...i know theres really no way to prove this...but I find it fun to think about.