Leonard Guarente was 38 and previously a tenured professor at Massachusetts Institute of Technology when he made a decision to commit himself to one of the most alluring problems in biology: how to decelerate growing old. A lot more than a few decades later on, the 72-yr-previous Guarente is taken https://www.wsj.com/health/wellness/longevity-antiaging-leonard-guarente-business-f55643f4?mod=health_lead_story