Sometimes the most arresting aspect of a natural object is its symmetry. The delicate and complex contours of a snowflake, for example, are all the more fascinating because of the crystal’s symmetrical branches. The sixfold rotational symmetry of a snowflake comes from the hexagonal structure of the ice crystal that, in turn, is related to the shape and orientation of the bonded water molecules.
The search for liquid fivefold symmetry
01 Mar 2001