Smile! Especially if you don’t feel like it

Smile, even if you don’t feel like it. Especially if you don’t feel like it, in fact, because it will make you feel better. This is classic social psychology wisdom. Fake it ‘til you make it. Recent studies have found that Botox can ease depression by making it harder for people to frown. And now, a new, large-scale study suggests a much more complicated link between facial expressions and emotions.