Modern people, in spite of their scientific knowledge, often seem as superstitious as their ancestors. Astrology is a half-billion-dollar business. Intelligent person still believe that lines on their palms or the arrangement of tea-leaves in a cup predict the future. Airplanes do not have a row of seats numbered 13, and building omit a thirteen floor. Black cats, broken mirror, and spilled salt create fear and anxiety in many people. And Ouija boards continue to be a popular pastime.