One of my favorite things to do when I’m out and about is smile at people. The responses to this are varied. Sometimes, I get no response because they never notice me smiling at them. But sometimes, I ...

Happiness is contagious, spreading among friends, neighbors, siblings and spouses like the flu, according to a large study that for the first time shows how emotion can ripple through clusters of ...

Turns out, misery may not love company — but happiness does, research suggests. A new study by researchers at Harvard University and the University of California, San Diego documents how happiness ...