  Many recent researches have investigated the deviations from the Friedmannian
cosmological model, as well as their consequences on unexplained cosmological
phenomena, such as dark matter and the acceleration of the Universe. On the one
hand, a first order perturbative study of matter inhomogeneity returned a
partial explanation of dark matter and dark energy, as relativistic effects due
to the retarded potentials of far objects. On the other hand, the fractal
cosmology, now modeled with a Lemaitre-Tolman-Bondi (LTB) metric, results in
distortions of the luminosity distances of SNe Ia, explaining the acceleration
as apparent. In this work we extend the LTB metric to ancient times. The origin
of the fractal distribution of matter is explained as the matter remnant after
the matter-antimatter recombination epoch. We show that the evolution of such a
inhomogeneity necessarily requires a dynamical generalization of LTB, and we
propose a particular solution.
