Aging- What is it?SenescenceStem Cells R,D,P (ESC, IPSC ,HSC, ASC, etc)Totipotent, Pl!ipotent, "ltipotent, #nipotentAgingWhy is this important?Cell $i%isionTelome!eIn &!ee' (tel) is en$ an$ (mere) pa!tEctopic e*p!ession