Scientists Say We Can Smell Happiness

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The old saying goes that happiness is contagious. New research suggests there might actually be some science to back that up. Happiness, scientists say, has a distinct smell that humans can sense on one another. And when we get a good whiff of someone else's joy, we get happier too.

The key lies in our sweat. According to psychological scientist Gün Semin of Utrecht University in the Netherlands, being exposed to sweat produced under happiness induces a simulacrum of happiness in receivers, and induces a contagion of the emotional state.