Leonard Guarente was 38 and previously a tenured professor at Massachusetts Institute of Technologies when he decided to commit himself to one of the most alluring problems in biology: ways to slow down aging. In excess of three a long time afterwards, the 72-yr-outdated Guarente is considered a grandfather in https://www.wsj.com/health/wellness/longevity-antiaging-leonard-guarente-business-f55643f4?mod=health_lead_story