Back to Show
NOVA
Arctic Sinkholes Preview
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
53:34
Explore the spectacular cosmic phenomenon of a total solar eclipse.
53:30
Explore the promise and perils of new A.I. technologies.
53:10
Follow the quest to recover DNA millions of years old for the very first time.
Unlock with PBS Passport
53:29
Explore the engineering behind Paris’s iconic landmark, the tallest structure of its time.
Unlock with PBS Passport
53:17
New evidence reveals the real story of Easter Island and the builders of its stone heads.
Unlock with PBS Passport
53:31
Giant fossils uncovered in the Sahara Desert reveal new secrets of how whales evolved.
Unlock with PBS Passport
53:31
A family turns to science in their struggle to rediscover a history obscured by slavery.
53:54
Follow the quest to create a lifesaving malaria vaccine.
53:19
The inside story of China’s meteoric rise to the forefront of global innovation.
Unlock with PBS Passport
53:15
How did Earth give rise to humans? See what made our species' existence possible.
Unlock with PBS Passport
53:45
How did life bounce back after a cataclysmic extinction wiped out some 90% of all species?
Unlock with PBS Passport
53:47
See how life made the leap to land, turning a barren landscape into a lush, green world.