AI weighs in on debate about universal facial expressions

When you are angry, do you scowl, cry or even laugh? To what extent do your facial movements depend on the situation you are in -- whether you are in a formal meeting, say, or at home with your family? And do other people around the world express anger in such situations in the same way? These questions are at the centre of a contentious scientific debate about the nature of emotion that has raged for more than a century. Writing in Nature, Cowen et al.1 enter the fray.