Skip to main content

Up Next

Great Mammoth Mystery

Great Mammoth Mystery

Season 49 Episode 3
53:16
Why Ships Crash

Why Ships Crash

Season 49 Episode 8
53:20
Ice Age Footprints

Ice Age Footprints

Season 49 Episode 9
53:43
Ending HIV in America

Ending HIV in America

Season 49 Episode 11
53:33
Saving Venice

Saving Venice

Season 49 Episode 12
53:31
Rebuilding Notre Dame

Rebuilding Notre Dame

Season 49 Episode 13
53:43
Computers v. Crime

Computers v. Crime

Season 49 Episode 14
53:30
Can Psychedelics Cure?

Can Psychedelics Cure?

Season 49 Episode 15
53:47
Ocean Invaders

Ocean Invaders

Season 49 Episode 16
53:32
Nazca Desert Mystery

Nazca Desert Mystery

Season 49 Episode 17
53:31
Crypto Decoded

Crypto Decoded

Season 49 Episode 18
53:22
NOVA Season 49

Zero to Infinity

Season 49 Episode 19
53:32
Back to Show
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.

Watch Preview