NOVA
Season 49 Episode 1 - Arctic Sinkholes
7.0 ?
1974
Documentary
In the Arctic, enormous releases of methane, a potent greenhouse gas, threaten the climate.
Episodes in Season 49
1
Arctic Sinkholes
55 min
NOW PLAYING
2
Secrets in the Scat
55 min
3
Great Mammoth Mystery
55 min
4
Augmented
55 min
5
Determined: Fighting Alzheimer's
55 min
6
Dinosaur Apocalypse: The New Evidence
55 min
7
Dinosaur Apocalypse: The Last Day
54 min
8
Why Ships Crash
54 min
9
Ice Age Footprints
54 min
10
Ultimate Space Telescope
54 min
11
Saving Venice
54 min
12
Ending HIV in America
54 min
13
Computers v. Crime
54 min
14
Can Psychedelics Cure?
54 min
15
Ocean Invaders
54 min
16
Nazca Desert Mystery
54 min
17
Crypto Decoded
53 min
18
Zero to Infinity
54 min
19
Rebuilding Notre Dame
54 min
