Last month, the US National Institutes of Health (NIH) formally launched a multi-agency effort to combat the country’s opioid-addiction crisis. Funds for research into controlling opioid misuse and treating pain will nearly double in 2018, to US$1.1 billion. The forces behind this epidemic extend beyond overprescription: most of the tens More

Nobody likes the feeling of being left out, and when it happens, we tend to describe these experiences with the same words we use to talk about the physical pain of, say, a toothache. “People say, ‘Oh, that hurts,’ ” says Nathan DeWall, a professor of psychology at the University of More