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Arctic Sinkholes

Season 49 Episode 1 | 53m 30s

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: 02/01/22 | Expires: 02/01/25
National Corporate funding for NOVA is provided by Carlisle Companies. Major funding for NOVA is provided by the NOVA Science Trust, the Corporation for Public Broadcasting, and PBS viewers.
Extras
Millions witnessed the Moon cover the Sun on April 8, some viewers sent us their videos.
Every now and then the sun hurls a piece of itself into the solar system.
Find out who’s using your data and what you can do about it.
A total solar eclipse is coming. If you want to check it out, you need eye protection.
The oldest DNA ever recovered revealed an ecosystem unlike anything that exists today.
Sometime between now and September a star will explode.
How did we discover exoplanets?
Explore the spectacular cosmic phenomenon of a total solar eclipse.
Explore the promise and perils of new A.I. technologies.
Dark Energy was first discovered in 1998, and scientists don’t fully understand it.
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