PHI = 1.618

PHI, the Divine Proprtion, is considered as a very important number in art and the most beautiful number in the universe becacuse plants, animals and even human beings all possessed dimensional properties that adhered with eerie exactitude to the ratio of PHI to 1. If you want to make a try, measure the distance from your shoulder to your fingertips, and then divide it by the distance from your elbow to your fingertips. What is the ratio? It's only be PHI, 1.618. Very fantastic. If you want to know more about this, read Da Vinci Code.