Can the universe grow?
No. The universe and its material constituents are everywhere. There is nowhere for the universe to grow into because the required empty space is an idealization, not a reality. The universe cannot expand and, by definition, there can be only one universe. Any portion of the universe might come into perceptible existence via convergence of its separate parts from elsewhere in the universe; any portion of the universe might go out of perceptible existence via divergence of its separate parts to elsewhere in the universe.
