In Digestion: Mary Roach Explains What Happens To The Food We Eat

With books like Stiff and Spook, Roach has built a reputation for making unpalatable subjects entertaining. In her new book, Gulp, she tackles the human digestive system, from the mouth on down. Along the way, she gets a sedation-free colonoscopy and goes on location for a fecal transplant.

Source: http://www.npr.org/2013/04/01/175381702/in-digestion-mary-roach-explains-what-happens-to-the-food-we-eat?ft=1&f=1008

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