As Ted Schuur stepped along the edges of Smith Lake, a bubble surfaced from the muck underfoot. And then another. They're bubbles of methane, a potent heat-trapping gas made from decomposing plants and animals that had once been stuck in Alaska's frigid permafrost.

Source: [Phys.org](https://phys.org/news/2026-10-gas-frozen-arctic-ground-slowly.html)

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