Leonard Guarente was 38 and by now a tenured professor at Massachusetts Institute of Technology when he decided to commit himself to one of the most alluring issues in biology: the best way to slow down aging. Much more than 3 decades afterwards, the 72-year-aged Guarente is considered a grandfather https://www.wsj.com/health/wellness/longevity-antiaging-leonard-guarente-business-f55643f4?mod=health_lead_story