Does the human body really replace itself every few years? The answer is yes, but different parts of the body do so at different rates. Learn all about which parts of your body are the speediest, and which take the longest to regenerate.
# Stuff You Should Know - Cell Regeneration Episode
Josh and Chuck dive deep into one of biology's most mind-bending facts: most of your cells are replaced every seven to ten years, yet you still age and eventually die. They explore the fascinating science of cellular regeneration, including how different cells have wildly different lifespans (your skin renews every few weeks while your brain cells stay with you for life), and how researchers used nuclear bomb radiation as a surprisingly clever dating tool to track cell age. The guys also grapple with some genuinely philosophical questions about what it means to be you when your body is constantly replacing itself, and wonder what the whole point of life really is if we're just recycling materials back into the environment.
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