What do we know about the atom? All we know is that it has mass and that mass is energy. We know that when you smash an atom you get smaller parts. Ok let's forget the silly names we give everything and lets call mass well lets call mass mass. We know that our solar system is made up of mass and if you smash it you will get smaller parts. We also know that our Solar System is part of a system lets call it a Galaxy or a Molecule what ever you like. Lets say that an atom is part of a galaxy well it is isn't it. Has anyone calculated how many atoms are in a grain of sand vs. how many stars are in a Galaxy. Now with all these similarities aside let us remember that Nature tends to repeat it's self. Now if you were nature and you wanted to evolve different dimensions then would it not be the easiest to make one fit into the other and so on. First it is Big Bang then it is String Theory then Membrane Theory. It sounds like cell division to me. But then again what do I know.