Leonard Guarente was 38 and already a tenured professor at Massachusetts Institute of Know-how when he made a decision to dedicate himself to one of the most alluring problems in biology: how to decelerate aging. Greater than 3 a long time later, the 72-12 months-old Guarente is considered a grandfather https://www.wsj.com/health/wellness/longevity-antiaging-leonard-guarente-business-f55643f4?mod=health_lead_story