2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/128323We consider the problem of the flattening of the velocity curves in galactic discs and the consequent postulation of dark matter from three different but converging perspectives-- a change in the large scale dimensionality of space, a variation of $G$ and the MOND approach. We also discuss the paradigm of the universe itself being a Black Hole.20 pages, LatexGeneral Physicstext