2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/84929We examine two far-reaching and somewhat heretic consequences of General Relativity. (i) It requires a cosmology which includes a preferred rest frame, absolute space and time. (ii) A rotating universe and time travel are strict solutions of General Relativity.4 pages, no figures, latexGeneral Physicstext