Science Fiction to Reality

Regrowing body parts has always been a thing of the imagination.  In Harry Potter  and the Prisoner of Azkaban the nurse, Madame Pomphrey, uses a potion to regrow all the bones in Harry’s arm.  In Men In Black an alien managed to regrow his head after it was shot off by Agent Kay.  In real life salamander’s have been able to regrow their own body parts after injury.  So could this idea be applied in real life?

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