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NOVA
Arctic Sinkholes
Season 49
Episode 1
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.
- Airdates
- Thursday Jan 8, 1:00 PM PST on PBS SoCal Plus
- Monday Jan 12, 7:00 PM PST on PBS SoCal Encore
- Tuesday Jan 13, 3:00 PM PST on PBS SoCal
- Tuesday Jan 13, 4:00 PM PST on PBS SoCal WORLD
- Tuesday Jan 13, 9:00 PM PST on PBS SoCal WORLD
- Wednesday Jan 14, 2:00 AM PST on PBS SoCal Encore
- Wednesday Jan 14, 5:00 AM PST on PBS SoCal WORLD
- Wednesday Jan 14, 7:00 AM PST on PBS SoCal Encore
- Wednesday Jan 14, 1:00 PM PST on PBS SoCal Encore
- Saturday Jan 17, 6:00 PM PST on PBS SoCal Encore
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