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These romantic-looking frost flowers over the Amundsen Gulf in the Arctic are the result of bacterial algae blooming into biofilms with the help of sunlight. Below, more frost flowers, because winter can be beautiful in its own sniffly, bundled up way.

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Matthias Wietz

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Sten Wiklund

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Sten Wiklund.

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NSF IGERT Trainee Jeff Bowman is shown collecting samples from frost flowers in the central Arctic Ocean.

Photo by Matthias Wietz

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