Cosmic Recurrence 2D: Tegmark's Level I Multiverse Lattice

Every tile in this 2D lattice stands for one Hubble-volume-sized region of an infinite universe, and every region is assigned one of only N possible particle arrangements — a finite number because a finite region can hold only finite entropy. Grow the lattice or shrink N and, exactly as the birthday paradox predicts, two regions eventually land on the identical arrangement: a genuine duplicate "parallel universe," joined here by a gold thread. Pan and zoom the lattice, and watch the live histogram of how many regions share each arrangement. This is the actual physics argument behind Tegmark's Level I multiverse — no wavefunction branching, no extra dimensions, just pigeonhole logic applied to an infinite universe with finite local possibilities.