Selects: Does the body replace itself?

In this episode, Josh and Chuck dive into the fascinating science of cellular regeneration and explore what it really means when we say your body replaces itself. They break down how scientists like Dr. Jonas Frisen used radioactive carbon dating to discover that most of your cells are only seven to ten years old, then explore the mind-bending philosophical implications of constantly being made of new material. The conversation takes an unexpected turn into existential questions about identity, the meaning of life, and whether we're just sophisticated machines recycling carbon through the ecosystem—all while explaining why we age and eventually die despite our bodies' incredible ability to regenerate.