The substrate boils — a universe winds down, and the next one is minted

A universe much like ours, late. Its stars redden, its light stretches thinner than the lattice can hold, gravity's coherent reach shrinks as the substrate settles onto its own edge of stability — and its black holes keep drinking the substrate, valveless, the biggest fastest, until one crosses the barrier. It pops, and the neighbours follow. From inside, the latent heat is a Big Bang: a billion-and-one matter knots against a billion of antimatter, the tie broken by the parent's residual swirl; the annihilation fog is the CMB. With gravity's reach 44× today's, the supersaturated substrate clumps into galaxies and heavy seeds at once. Then the wall hits the sandbar — the moraine the previous bubble wrote — at z ≈ 2.2, crosses M = 1 at z = 1.588, drops its boulders, and rings a chirped undular train down past you, with a recovery-zone depression at the crossing and the harmonic edge at z = −0.25 still in your future. Crust profile: the 14-knot bore-skeleton fit to DESI BAO + Jia H₀(z) (χ² = 10.2 vs ΛCDM's 29.0 on the same observables).