2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/154586This review was given at the 65th birthday meeting of D.W. Sciama, The Renaissance of General Relativity and Cosmology, to be published by Cambridge University Press. It presents progress in the understanding of non-standard relativistic cosmologies during Sciama's career, organized by the areas of application rather than the mathematical types of the models.21 ppGeneral Relativity and Quantum Cosmologytext