Snow are able to grow to hundreds of micrometers or millimeters in size at the expense of the water droplets by the Wegener–Bergeron–Findeisen process. The corresponding depletion of water vapor causes the ice crystals to grow at the droplets' expense. These large crystals are an efficient source of precipitation, since they fall through the atmosphere due to their mass, and may collide and stick together in clusters, or aggregates. These aggregates are snowflakes, and are usually the type of ice particle that falls to the ground. Although the ice is clear, scattering of light by the crystal facets and hollows/imperfections mean
Ice Warrior Ice Warrior The Ice Warriors are a fictional extraterrestrial race of reptilian humanoids in the long-running British science fiction television series "Doctor Who". They were originally created by Brian Hayles, first appearing in the 1967 serial "The Ice Warriors" where they encountered the Second Doctor and his companions Jamie and Victoria. In "Doctor Who", the Ice Warriors originated on Mars, which within the series narrative is a dying world. Their early appearances depict the Ice Warriors as attempting to conquer the Earth and escape their planet as early as Earth's Ice Age. A frozen group are discovered by an Earth