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The discovery of alcoholic brews dates to ancient times. And it's a safe bet that the discovery of the hangover was not far behind. From cow's stomach to the hair of the dog, various cultures have developed cures to deal with overindulgence. Here are a dozen we've come across, with some help from a group of college students who picked up tips while spending a semester or two steeped in global cultures. - Compiled by Spencer Bates and Sophie Hoeller of Boston University, Erin Kiley of the University of New Hampshire, Jeanine Navarette of Wellesley College, Julia Kitlinski-Hong of Emmanuel College, Paul Makishima, Globe staff, and National Geographic Magazine