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Science writer Mary Roach returns to Bullseye. She joins us to talk about her latest book: Replaceable You: Adventures in Human Anatomy. It's a history and snapshot of how humankind has gotten better at recreating body parts. A heads up, we will get into medical procedures, surgeries and those which include the removing and reattaching of body parts. It's a bit grisly. But stick around, we also talk about "superclean" pigs!

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