Your Body's Real Age | NPR's SKUNK BEAR

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Do all of your cells get switched out for new ones every seven years or so? Does anything remain with you throughout your entire life?
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The question was posed on the NPR podcast Invisibilia by co-host Lulu Miller. Listen to their episode (exploring the constancy of personality) here:
http://www.npr.org/programs/invisibilia/482836315/the-personality-myth

Produced by Adam Cole and Ryan Kellman
Senior Editor and Wardrobe Consultant: Geoff Brumfiel
Supervising Editor: Anne Gudenkauf
Key Grip: Kristin Adair

How did scientists figure all this out? With a little help from nuclear bomb testing. More info here:
http://skunkbear.tumblr.com/post/146593746334/c14

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