Have you ever wondered if we could replace old worn body parts much like you’d replace parts on your car? Well, that time is nearly here and the possibility of greatly lengthening lifespan may be just around the corner. New discoveries in the scientific community are quickly advancing the ability to not only replace organs, but grow them from a patients own unique cells. This episode from NOVA reveals some of the unusual techniques that have allowed scientists to create the structures necessary for new ears, lungs and even hearts while showing us that the day of rejected donor organs and long recovery periods may well be gone.

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