Mary Roach

Mary Roach is the author of Grunt: The Curious Science of Humans at War,  and several previous books including: Gulp. Adventures on the Alimentary CanalPacking for Mars: The Curious Science of Life in the Void, Bonk: The Curious Coupling of Science and Sex, Spook: Science Tackles the Afterlife, and Stiff: The Curious Lives of Human Cadavers. Her writing has appeared in Outside, Wired, National Geographic, and The New York Times Magazine, among others. She lives in Oakland, California.

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The Story of Saliva

Why do newborns drool excessively? How many pints of saliva does a person generate daily? (Hint, it's more than one.) And more spit mysteries excerpted from "Gulp: Adventures Down the Alimentary Canal."

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