Crystal Perfection

Could someone please tell me how nature can be this amazing? This is an actual picture of a snowflake. Perfectly symmetrical and, if you look closely, there's even a smaller snowflake outline right in the center. How can something this perfect be created in an instant and just fall out of the sky? And not just one perfect design falling... but millions. It's so completely awesome. Another fabulous joy of the season. Merry Christmas.