The science of snowflakes: See how they form and why no two are ever alike Snow is made up of trillions of tiny ice crystals that make snowflakes, with not one alike.

"Space ice" contains tiny crystals and is not a completely disordered material like liquid water, as previously assumed, ...

Water frozen in the darkness of space doesn't appear to behave the way we thought. A new research effort using computer ...

Precipitation begins in clouds as water droplets and ice crystals. ... The National Weather Service has a very handy graphic to help explain the differences. Rain, freezing rain, sleet and snow, ...

As ice crystals start to form, the concentration of sugars and other dissolved materials in the unfrozen liquid increases, which further lowers its freezing point.

As the ice crystals fall down to the surface of the Earth, they can pass through air of all different temperatures! That's simply what creates different precipitation types.

The shape of the ice crystal is the key. It's called a plate, and it's shaped like a hexagon. They must be light enough to float very slowly down from the sky, or almost be suspended in the air.

Space ice” contains tiny crystals and is not, as previously assumed, a completely disordered material like liquid water, ...