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Credit: Submitted by Paul Schwartz
Water can form interesting ice crystals on surfaces that separate warm and cold air, like this porch window in Rochester, NY. Water first froze into dendrites, then some of it thawed to form droplets. Those droplets then refroze to form smaller dendrites on the surface of the droplets.
Submitted by Paul Schwartz
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Related C&EN Content:
Chemical & Engineering News
ISSN 0009-2347
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