Josh Mitteldorf, PhD, is a physicist turned aging researcher and the author of "Cracking the Aging Code." He explores why aging may be a programmed process shaped by evolution, diving into concepts like caloric restriction, telomere shortening, and altruistic cell death. Mitteldorf discusses species that exhibit negligible aging, the role of insulin in lifespan, and the potential of exosomes for rejuvenation. He also touches on the ethical implications of life extension and shares practical longevity tips, offering a fascinating glimpse into controlling our biological clock.