Why Do Americans Smile So Much?

If you want to know what people are really thinking, Reddit is usually a pretty good place to start. When someone posed the question, “What’s a dead giveaway that someone is American?” Redditors delivered. The consensus was that people from the land of the free and the home of the brave walk around grinning like lunatics for no good reason. If Americans smile too much, some other cultures tend to lean toward the grim side. Why such a discrepancy in facial expressions? The Atlantic’s Olga Khazan digs into the research. getAbstract recommends this illuminating article to traveling businesspeople and expats.