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Cosmic Recurrence: Tegmark's Level I Multiverse

Interactive 3D lattice of Hubble volumes: each region gets one of a finite number of possible particle arrangements, and the birthday-paradox math forces identical copies to appear as the lattice grows — the actual argument behind Tegmark's Level I parallel universes.

Cosmology3DModerate60 FPS📱 Mobile-adapted

Every cube in this 3D 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. 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.

⚙ Under the hood

An interactive 3D lattice of Hubble-volume-sized regions, each assigned one of a finite number of possible particle arrangements — grow the lattice or shrink the arrangement count and watch identical regions appear, exactly as the birthday paradox predicts for Tegmark's Level I multiverse.

cosmologymultiversetegmarkbirthday-paradoxinfinite-universeprobability

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install