2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/225381We show that a class of bi-gravity theories contain solutions describing dark matter. A particular member of this class is also shown to be equivalent to the Eddington-Born-Infeld gravity, recently proposed as a candidate for dark matter. Bigravity theories also have cosmological de Sitter backgrounds and we find solutions interpolating between matter and acceleration eras.4 pages, 1 figure, minor corrections and reference additions, published in Phys. Rev. DGeneral Relativity and Quantum CosmologyAstrophysicsHigh Energy Physics - Theorytext