Ground Truth Trekking

Stars on gravel

Overnight these crystals grew in the supercooled water from a nearby spring. Radiating crystals like this are not diagnostic of supercooled water. We saw similar forms in merely near-freezing water after cold nights. However, when they appear dramatically after a night that leaves only light frost and thin skim-ice, they probably form in super-cooled water. Read more about our Life on Ice expedition.

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By Bretwood HigmanErin McKittrickGround Truth Trekking

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