High Quality Content by WIKIPEDIA articles! The astrocytic hypothesis of ageing of mammals (briefly the astrocytic hypothesis) - suggests that aging of mammals is a genetic disease that causes death, the cause of which consists in aromorphosis in the theriomorph lineage of the vertebrates: - transformation of radial glia cells into star-shaped astrocytes during the postnatal development, i.e. disappearance of the fetal radial ways of neuroblasts migration from proliferative zones to the sites of their ultimate localization in the brain of adult individuals.