Senolytics can prevent and treat age-related diseases in mice, but data in humans are lacking — for now. Facebook Email In the 1960s, US anatomist Leonard Hayflick observed that replicative cells have a limited number of divisions, caused in part by telomere shortening and later dubbed the Hayflick limit. He saw that some cells stopped dividing but refused to die, a process called senescence that has since been implicated in many diseases and is now being targeting by biotech and...