General relativity prescribes how matter moves in a gravitational field but not why gravity exists. Dark matter, despite decades of direct searches, remains undetected as a particle—its origin is unknown. We propose that both phenomena originate from the κ‑field, the untransformed physical information in the Physical Information Cosmology (PIC) framework. In our universe (U1), all matter shares an intrinsic information pattern A_μ^ (U1). The κ‑field contains a spectrum of patterns A_μ^ (κ, i) ; among them, one pattern is exactly identical to A_μ^ (U1), giving a coupling coefficient κ=1 that produces perfect resonance. This resonance draws matter toward its homologous higher‑dimensional template—projected in four‑dimensional spacetime as gravity. The remaining patterns partially match A_μ^ (U1) (0<κ<1), yielding partial resonance that is activated only above a critical mass threshold Mc≈1011M⊙ (where M⊙ denotes the solar mass, 1. 99×1030 kg) —explaining why dark matter effects appear only in galaxies and clusters. This unified mechanism finds observational support across multiple scales: the apparent mass–gas separation in the Bullet Cluster is reinterpreted as a "spacetime information disparity" between instantaneous κ-field mediation and light-speed electromagnetic signals; flat galaxy rotation curves, including their recently discovered persistence to megaparsec scales, emerge from a κ-field/dark energy synergy; the systematic absence of dark matter in systems below Mc provides a sharp, testable prediction within reach of current and near-future surveys (LSST, Euclid). The framework preserves all successes of general relativity—every solution of Einstein's equations remains a solution—while grounding it in a deeper ontology: Einstein's geometry becomes the effective four-dimensional manifestation of higher-dimensional information resonance. Gravity and dark matter are not separate mysteries; they are two faces of the same κ-field, unified under a single testable paradigm rooted in first principles.
Zhong Wang (Sat,) studied this question.