From NOVA PBS Official.

What happens when the Arctic’s ancient freezer starts to fail? Discover why thawing permafrost is a concerning global warming wildcard.

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 https://www.pbs.org/wgbh/nova/video/arctic-sinkholes/

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