NOVA

S49 E1 | PREVIEW

Arctic Sinkholes Preview

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.

AIRED: February 02, 2022 | 0:00:30
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TRANSCRIPT

- Giant craters were spotted in Russia.

- [Narrator] The frozen world of permafrost is melting.

- The ground exploded.

- [Narrator] Releasing planet-warming gasses.

- [Woman] There's a huge amount of methane

and natural gas trapped in the permafrost.

- [Narrator] What will it mean for our planet?

- It's a scary wild card in the climate change story.

- It could really affect everyone on earth.

- [Narrator] "Arctic Sinkholes," on Nova.

(dramatic music)

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