Probably everyone has heard that a snowflake has six sides. I wonder why. It is reported that since the water molecule is polar, the molecules arrange themselves in a hexagonal ring. I wonder why 6 sides and not 4,5,7,8,9,... etc. Also.as a water molecule approaches a developing snowflake, how does it know where to attach itself. The molecule on one limb of the snowflake does not have any idea of the structure of the other side, does it?