1. A method for enriching for neural stem cells (NSCs) or a more restricted subset of progenitors, comprising: identifying cells with at least one positive neural stem cell marker from a population of cells from a tissue selected from the group consisting of brain and retina; and enriching said cells for cells having a said positive neural stem cell marker, wherein said positive neural stem cell marker is CD95, thereby obtaining a population of cells enriched for neural stem cells or a subset of progenitors of neural cells more restricted than NSCs.