Leonard Guarente was 38 and previously a tenured professor at Massachusetts Institute of Technologies when he made a decision to devote himself to one of the most alluring challenges in biology: the best way to decelerate getting older. In excess of three decades later on, the seventy two-year-old Guarente is https://www.wsj.com/health/wellness/longevity-antiaging-leonard-guarente-business-f55643f4?mod=health_lead_story