Delicate strands of extraordinarily thin ice grow out of rotting tree branches like hairs on a head. The ephemeral hair ice can last for only a few hours to a few days if the temperature stays freezing. Researchers have known that cold-tolerant fungi are responsible for the tufts of ice, but only recently uncovered the species responsible for the ice growth, the chemical composition of the melted
![Photos: 'Hair Ice' Grows Out of Rotting Tree Branches](https://cdn-ak-scissors.b.st-hatena.com/image/square/e5b27f793fa9e73430eac20ca24e4a0feeba2bef/height=288;version=1;width=512/https%3A%2F%2Fcdn.mos.cms.futurecdn.net%2FchGZStqw7kY3SYeG2LrQyT-1200-80.jpg)