Leonard Guarente was 38 and currently a tenured professor at Massachusetts Institute of Engineering when he made a decision to devote himself to One of the more alluring challenges in biology: ways to slow down aging. Over a few decades later on, the seventy two-year-aged Guarente is taken into account https://www.wsj.com/health/wellness/longevity-antiaging-leonard-guarente-business-f55643f4?mod=health_lead_story