What happens in our brains when we do things that feel good, such as drinking a glass of wine, exercising, or gambling? How and why do we become addicted to certain foods, chemicals and behaviors? David Linden, a neuroscientist at Johns Hopkins, explains these phenomena in his latest book, The Compass of Pleasure: How Our Brains Make Fatty Foods, Orgasm, Exercise, Marijuana, Generosity, Vodka, Learning, and Gambling Feel So Good (Viking, 2011).

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