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Lake Abraham in Alberta, Canada, is exposed to such sudden temperatur­e drops that gas bubbles are frozen mid-movement to form this stacked-disc spectacle. Fixed in place before they can reach the surface and escape, these unique freeze-framed bubbles contain methane, a gas produced by bacteria as it decomposes plants and animals on the lake’s bed. The mesmerisin­g pattern returns to motion during warmer months, as they thaw and fizz away into the atmosphere. This sudden release of methane can be a hazard due to the greenhouse gas’s extreme flammabili­ty.

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