All your cells have the same DNA but each cell type deactivated certain DNA regions that don’t apply to it. The theory here is that as we age the cells epigene

All your cells have the same DNA but each cell type deactivated certain DNA regions that don’t apply to it. The theory here is that as we age the cells epigenetics fuzz out, so that skin cells start to look a bit more like neurons and other cells and vice versa.