Up Next
Back to Show
Watch Preview
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.
Support Provided By
Season
53:32
Follow the investigation into the deadly container ship collision that closed the Port of Baltimore.
53:40
Archaeologists uncover new truths about Pompeii, a wealthy Roman playground with dark secrets.
53:40
A long-lost ancient cemetery opens the door to a unique period in Egyptian history.
53:40
Fossils reveal how birds survived the killer asteroid and became today’s only living dinosaurs.
Unlock with PBS Passport
53:40
Follow the race to build a world-class airport on the site of one of America’s busiest flying hubs.
Unlock with PBS Passport
53:43
Can science reveal the secrets of mysterious objects seen in our skies?
Unlock with PBS Passport
53:40
Mysterious bodies are found under one of the world’s most famous cathedrals.
53:40
From electric flight to artificial noses, engineers are finding new ways to preserve our planet.
53:40
Humans are born to roam. See how engineers are inventing new ways to explore and extend our range.
53:40
Is engineering humanity’s superpower? See how we can amplify our natural abilities in amazing ways.
53:40
Dive into the universe at the tiniest – and weirdest – of scales.
Unlock with PBS Passport
53:34
Meet the surprising, oddball worlds moving around our solar system.