A study published this week leaves none of us surprised: Screen-addicted teens are unhappy. The lead author is Jean M. Twenge, the professor of psychology who wrote The Atlantic piece "Have Smartphones Destroyed a Generation?" (In a nutshell, maybe, but it's a hopeful sign that teens themselves are beginning to link their mental health troubles to their always-buzzing devices.)

What Twenge and her team at San Diego State University found in their new research is that the happiest teenagers used digital media for less than an hour per day. They spent their time doing other things instead - playing sports, reading newspapers (really?) and engaging in good old-fashioned face-to-face interaction.