Hoarfrost makes use of the moisture in the atmosphere to grow and interlock, making for a dramatic frost sculpture on anything solid like trees, fences and even power lines.

These impurities are crystal seeds, nuclei as it were. If water is pure enough, you can take it down to minus 55 degrees — just in case you wanted to know — without freezing.

Called “hoarfrost,” this weather phenomenon only occurs when the air is cooled to the frost point and the water vapor bypasses the liquid stage as it condenses around items like tree branches ...