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Posted on BrandNewTube is a video describing two kinds of ice in Antarctica -- regular water-based ice that we already know, and a blue "sky ice" that is extremely cold and skips the liquid stage, vaporizing into gas.  (This is known as super-heating/super-cooling or sublimation chemistry.) Scientists at the Antarctic bases apparently spend a lot of their time studying this sky ice (also called blue ice)...  Click on image for video.

 

A second video showing photographs of the horizon in Antarctica: