Snowflakes are like letters from the sky, each crystal a note describing the atmosphere ... what influences the different structures and what to expect for future cold seasons.

Like snowflakes ... now know that H 2 O takes on a six-sided structure because of the way hydrogen bonds link water molecules. Kepler’s crystal ponderings laid the groundwork for the field ...

This rare 12-armed crystal is the result of two ... The six arms of the typical snowflake derive from the molecular structure of water. Kljatov told RFE/RL that some days the snowflakes have ...