Leonard Guarente was 38 and by now a tenured professor at Massachusetts Institute of Engineering when he chose to dedicate himself to one of the most alluring difficulties in biology: tips on how to decelerate getting old. Much more than a few many years later on, the 72-year-old Guarente is https://www.wsj.com/health/wellness/longevity-antiaging-leonard-guarente-business-f55643f4?mod=health_lead_story