A huge snowstorm could dump more than two feet of snow all over the East Coast, and that means trillions and trillions of tiny snowflakes. Through advances in crystallography, scientists have learned a lot about the structure of snowflakes. While they all start pretty much the same, once they start crystallizing, it’s true that no two snowflakes are alike. In fact, the number of possible shapes is staggering. Reactions Audience Survey: http://bit.ly/ReactionsSurvey.