Hair ice

Rarity: Common

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Science and technology

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What Wikipedia says

Hair ice, also known as ice wool or frost beard, is a type of ice that forms on dead wood and takes the shape of fine, silky hair. It is somewhat uncommon, and has been reported mostly at latitudes between 45 and 55 °N in broadleaf forests.

Excerpt from the Wikipedia article “Hair ice”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: KateWishing, CC0, via Wikimedia Commons.