Leonard Guarente was 38 and already a tenured professor at Massachusetts Institute of Technological innovation when he decided to commit himself to The most alluring problems in biology: ways to decelerate aging. Much more than three decades later, the 72-year-previous Guarente is considered a grandfather on the booming longevity motion. https://www.wsj.com/health/wellness/longevity-antiaging-leonard-guarente-business-f55643f4?mod=health_lead_story