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Who could have imagined that a book on the alimentary canal could be this much fun? Mary Roach has written an absolutely delightful book on the subject. She writes with such wit that even the most obstinate learner couldn't help but enjoy this book. Many times I simply busted out laughing; this is probably the funniest scientific book I've ever read. If learning was always this amusing and fun, no child would ever hate going to school.