Leonard Guarente was 38 and currently a tenured professor at Massachusetts Institute of Technological know-how when he chose to devote himself to Among the most alluring complications in biology: how to decelerate aging. Over three decades later, the 72-12 months-outdated Guarente is considered a grandfather of your booming longevity movement. https://www.wsj.com/health/wellness/longevity-antiaging-leonard-guarente-business-f55643f4?mod=health_lead_story