What If Dark Matter Is Consciousness at Cosmological Scale?

Dark matter has never been directly detected. Consciousness has never been explained in physical terms. Both are known exclusively through their effects. I propose that dark matter and consciousness are two scale-dependent manifestations of a single relational field. The title frames this as a guiding question; the paper develops and tests a precise structural hypothesis. I apply persistent homology, to six datasets spanning 27 orders of magnitude: cerebellum and cortex density maps, a structural brain connectome, the March 2026 internet AS-level topology, the cosmic web from IllustrisTNG TNG300-1 and an Erdős–Rényi null model. The result: real networks are 78.9 times closer to each other in Wasserstein H₁ distance than to an Erdős–Rényi null model (robust across 10 random seeds: mean 87.7-fold, SD 11.3, 95% CI [80.6, 94.7]). The finding survives structured null models: real networks remain 13.5 times closer than to Barabási-Albert networks and 18.4 times closer than to Watts-Strogatz networks. The cosmic web is topologically closest to the brain connectome (W₁ = 3.25) among all cross-domain comparisons, despite approximately 27 orders of magnitude in scale separation. The similarity is hierarchical: same-organ < cross-modality < cross-domain ≪ null. This pattern is specific to H1 (loops/cycles); H0 (connected components) does not show the same separation, suggesting that cycle structure, not mere connectivity, carries the cross-scale signature. I interpret this through emergent gravity, relational quantum mechanics, and integrated information theory. Five falsification criteria are specified.