Modern people, in spite of of their scientific knowledge, often seem as superstitions as their ancestors. Astrology is a half -billion - dollar business. Intelligent persons still believe that lines on their palm or the arrangement of tea leaves in a cup predict the future. Airplanes do not have a row of seats numbered 13 , and buildings omit a thirteenth floor. Black cat , broken mirrors and spilled salt create fear and anxiety in many people. And ouija boards continue to be a popular pastime