Arctic Sinkholes

What happens when the Arctic’s ancient freezer starts to fail? Scientists have uncovered the truth behind giant sinkholes exploding from the frozen ground in Siberia, and a vast lake bubbling with methane in Alaska .They are pointing to a dramatic shift beneath our feet – one driven by thawing Arctic permafrost, the vast frozen layer that stores nearly twice as much carbon as the entire atmosphere. Learn why these geological curiosities reveal a dangerous climate wildcard – one powerful enough to accelerate global warming in ways current models don’t yet predict. To watch the full film, visit Learn more about NOVA and

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Arctic Sinkholes is an episode from NOVA Now by GBH.

This episode is 16:37 long.

This episode was published on Mar 31, 2026.

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