There was never a time that ever existed in which there was no existance. There was never at any time of existance when there was nothing to exist. All that now is has allways existed except for that which has changed from it's original existance. The universe not the known universe is what is and the only change that has ever changed is the molecular existance of the same that exists. There has allways been matter and there will allways be matter. If a black hole sucks a galaxie in, it will eventually explode and create a new galaxie. Even trillions of years ago this process has always been the same. New galaxies are forming right now even as I type this message somewere in the universe. Any matter that we as earthlings measure for it' time of existance is only the time of existance of our own galaxie. There are galaxies that have existed in the eons of time even before our own galaxie ever thought of forming. We are or ever will be discovering just what is availiable to us and that is only what we can get our hands on to discover.