It’s not hard to notice when your co-worker is grouchy, your friend is exhausted, or your boss is overjoyed. Without recognizing it, we easily pick up on other people’s emotions by registering certain behavioral cues. In turn, we understand whether we need to back off, lend a helping hand, or, in the case of the boss, ask for a raise. Now comes the question: If we can do this, then why not computers? Why not robots? Indeed, by picking up on some of these same emotional traits, robots today are learning to act more naturally around their human counterparts.