Mary Roach has been called "America's funniest science writer." Master of the monosyllabically titled bestseller, she has explored sex in Bonk, corpses in Stiff, and the afterlife in Spook. Her latest book, now out in paperback, is Gulp: Adventures on the Alimentary Canal. It's, you know, completely gross. But in a way that you can't put down.
What kind of things might you learn in a Mary Roach book about the alimentary canal, that convoluted pipeline that runs from where you food goes in all th...
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