The old adage may have it that we shouldn’t judge a book by its cover, but ever since Aristotle first wrote about the art of physiognomy, people have thought it possible to deduce character traits from someone’s facial features. Though now dismissed as pseudoscience, there​ may still be a kernel of truth in the idea that someone’s face can shape their destiny - a Princeton University study showed it takes us a tenth of a second to size up the cut of a stranger’s jib and, rightly or wrongly, we react to them accordingly. Hence, recent studies suggest that those...