P25: Dark Matter: Connecting Galaxy Clusters, Galaxy Rotations, Neutron Star Mergers, W and Z Boson Masses, and Atomic Structure Through One Physical Constant

The converging constraints from six independent physical sectors spanning forty orders of magnitude in physical scale compel a reidentification of the dark matter phenomenon. It is not a missing particle. It is the Spaticle field: a real, continuous, elastic substrate filling all space, whose intrinsic equilibrium density ρ_s = 5.9 x 10^-27 kg/m^3 is independently constrained across those six sectors. The same substrate density that produces correct W and Z boson masses while remaining consistent with topology-derived coupling constants, and derives the Higgs mass as a geometric mean, also explains galaxy rotation curves across 175 SPARC galaxies without dark matter particles or per-galaxy tuning (chi-squared 1.31 versus MOND 1.47), reproduces KiDS-1000 weak gravitational lensing profiles with chi-squared 0.007 to 0.067 against NFW chi-squared 5.77 to 6.57, and predicts the GW170817 post-merger carrier relaxation timescale, confirmed at τ_obs ≈ 18.6 ms within the independently bounded window of vacuum floor τ_c = 4.6 ms; τ_obs = F × τ_c ≥ 4.6 ms. A sixth and independent line of evidence is presented in this paper: the substrate localisation resistance coefficient, constrained by the measured Bohr radius of hydrogen, reproduces the hydrogen ground state energy from first principles and demonstrates that stable matter itself requires the Spaticle field to exist regardless of formation history. Six independent sectors converging on one substrate density and one identification. Zooming from galactic megaparsecs down to subatomic femtometres (a fractal zoom across forty orders of magnitude), the same constant holds at every level of magnification. This paper argues that the physical substrate and gravitational mechanism responsible for dark matter effects have now been identified, and predicts that no separate particulate dark matter will ever be discovered. It further proposes, with exact replacement equations, that the existing equations of gravity require modification to account for the additional gravity produced when fast-rotating structures such as most galaxies, and the extremely rapid interaction of massive merging objects, entrain the Spaticle substrate. The dark matter programme correctly detected real gravitational anomalies. Its error was ontological, not observational: the programme was detecting the Spaticle field.