Einstein wore sweatshirts that grew rattier over the years, because wool sweaters made him itch. When his wife, Elsa, "urged him repeatedly to dress up for important company," wrote one historian, "Einstein quipped that if the important visitors were coming to see him, they'd see him as he was; but if they were coming to see his clothes, Elsa would show them to his wardrobe." Courtesy Science Cafe / Facebook
