How Much of Your Body Is New Every Year? | Compilation

Certain parts of you continue to regenerate. You can regrow your liver, for instance. But why not your lungs or legs? Scientists are getting closer to solving that mystery.

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Sources:

https://www.gettyimages.com/detail/video/starfish-stock-footage/473290599?adppopup=true
https://commons.wikimedia.org/wiki/File:Humanstemcell.JPG

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