In Gulp. Adventures on the Alimentary Canal, science writer Mary Roach takes a journey through the gut, from the secret healing powers of saliva to the taxonomy of poop. Along the trip, she serves up odd medical anecdotes, such as the story of William Beaumont, an eccentric surgeon who once ate chicken from another man's stomach.
From time to time during this election season we'll be introducing you to ordinary people that our reporters meet out on the campaign trail. Today: a snapshot from a Donald Trump rally in New Hampshire.
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