I love seeing this thread pop up from time to time.. While my claustrophobia says oh hell no, my curiosity screams yes please lets go exploring.. thankfully the claustrophobia wins out every time lol
There is a theory (though I may have heard/understood it incorectly) that the universe as we know it got its beginning from an exploding black hole. That at one time the universe burnt itself out expanding and collapsed back into itself untill everything was cruahed back into the basic elements...