Leonard Guarente was 38 and already a tenured professor at Massachusetts Institute of Technology when he chose to devote himself to One of the more alluring troubles in biology: how you can slow down getting old. Over 3 many years later, the 72-12 months-aged Guarente is considered a grandfather in https://www.wsj.com/health/wellness/longevity-antiaging-leonard-guarente-business-f55643f4?mod=health_lead_story