And until her book Faces of Science, she had never photographed scientists. Her usual portrait subjects were artists and writers, and while she won’t say anything unkind about artists and writers as a social group, she confesses that she was impressed with scientists. For one thing, they gave her their full attention. For another they almost all—and that includes the 28 Nobel prize winners who agreed to pose for her—answered their own phones. When she asked them questions about their research, they answered, courteously, and in clear language.