Eternal Foam, Gravity--Plexus Expansion, and Relic Graviton Double-Loops:

In the Foam–Plexus Theory of Everything (ToE), spacetime is an eternal quantum foam of Planck-scale quanta connected by wormholes. Distinct plexuses (Gravity, EM, Weak, Strong, Higgs) are emergent subnetworks that mediate forces and define particle struc- tures. We argue that the foam is eternal and invariant, while only the Gravity–plexus evolves on cosmological scales. This decoupling preserves the constancy of G, α, particle masses, and other low-energy constants, yet allows large-scale geometry to change through the state of a gravity-only sector. We identify the cosmologically active component as a relic graviton double-loop medium—stable, closed, Gravity-face double loops left from early foam turbulence. Its bound phase behaves DarkMatter-like, while its percolating unbound phase has a negative effective pressure that drives late-time acceleration. We provide ex- plicit evolution equations for the Gravity–plexus density, quantify force-hierarchy rigidity via harmonic-oscillator wormhole scales, list falsifiable signatures (GW “mesh” noise, small w(z) drift, lensing subtleties, local H variation), and link the scenario to an inflationary prelude without singularities. This yields a constant-G cosmology that addresses the cosmological constant problem, the Hubble tension, and the stability of local physics. (Technical foun- dations: BEAST ToE, Gravity standalone, Oscillator wormholes, LQG/String mappings [1, 2, 3, 4, 5].)