I've seen a lot of programs about M Theory and string theory and such which suggest that there could be an infinite number of infinite universes in this multiverse. And according to microwave background radiation our universe is infinite. But how could there be an infinite amount of infinite Universes? Wouldn't there have to be a boundary for each of these Universes? If one Universe is infinite and never ever stops, how could there be an infinite amount of universes that never stop? Sorry it's my first post but this really confuses me after all these shows I watch on BBC and stuff.