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].)