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NOVA· Season 49 · Episode 5

Arctic Sinkholes

S49E05·7.0·February 2, 2022·1h·PBS

Colossal explosions shake a remote corner of the Siberian tundra, leaving behind massive craters. In Alaska, a huge lake erupts with bubbles of inflammable gas. Scientists are discovering that these mystifying phenomena add up to a ticking time bomb, as long-frozen permafrost melts and releases vast amounts of methane, a potent greenhouse gas. What are the implications of these dramatic developments in the Arctic? Scientists and local communities alike are struggling to grasp the scale of the methane threat and what it means for our climate future.

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#19In Season 49of 24 rated episodes
#230All-timeof 287 rated episodes
−0.7vs season avgSeason 49 averages 7.7
2022First airedFebruary 2, 2022

Guest stars

Mercer BoffeyMercer Boffeyas Narrator (voice)

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