Fearing the worst can lead to physical changes, according to this fascinating study of a strange medical phenomenon Fearing the worst can lead to physical changes, according to this fascinating study of a strange medical phenomenon I n Roald Dahl’s 1980 masterpiece The Twits, Quentin Blake’s illustrations demonstrate how Mrs Twit’s horrible attitudes eventually ended up deforming her looks. “If a person has ugly thoughts,” wrote Dahl, “it begins to show on the face.” In her latest book, science