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 qualities of the monsters as well as to suggest that the Martian atmosphere is composed differently from that of Earth. The hissing voice is believed to have been developed by Bresslaw. Ice Warriors also have sonic weaponry built into their wrists. "The Seeds of Death" introduces an officer caste often referred to as Ice Lords. They are less armoured than their soldier counterparts and lack their mounted sonic weaponry. Common to both the Ice Warriors and Ice Lords are claw-like gloves. For the return of the characters in 2013's "Cold War", these became three-fingered gloves, similar to another Doctor Who