Biverso: Black Holes, White Holes, and the Multidimensional Spring

We propose a specular universe framework — the Biverso — in which our observable universe and a topologically paired counterpart are connected through a multidimensional oscillatory geometry (the multidimensional spring). In our universe, rotating black holes (Kerr geometry) continuously produce dark matter through asymmetric Hawking radiation. In the specular universe, white holes dominate, visible matter is the majority constituent, and the cosmological constant is negative (Λ < 0), driving contraction. The role of dark energy is played by gravity itself. The two universes are connected through the Einstein-Rosen bridges of every black hole — the cosmological generalization of the Kruskal-Szekeres maximal spacetime extension. The ER=EPR conjecture (Maldacena (2) the empirical exponent 3. 42 in J (a/M) is proposed to arise from the product ΩH·Vₑrgo of Kerr geometry quantities, reproducing the observed value to within 0. 6%; (3) the dark matter particle mass is constrained to approximately 3. 8 GeV/c² for NBH = 10¹⁹; (4) a natural explanation for the σ8 tension emerges from the time-evolution of ΩDM* (t) ; (5) the two-component black hole mechanism distinguishes stellar black holes (dark matter producers) from supermassive black holes (visible matter consumers), with ~42% of accreted mass-energy remaining in our universe as radiation and ~58% crossing the bridge. The framework generates ten falsifiable predictions (P1–P10). All speculative elements are clearly distinguished from established physics throughout. Related publications: DOI 10. 5281/zenodo. 20058557 | DOI 10. 5281/zenodo. 20068930