Back to Show
Changing Seas
Maug’s Caldera: A Natural Laboratory - Trailer
In the remote Pacific, the Maug Islands rise out of the sea. Formed by an ancient volcano, shallow hydrothermal vents are found close to corals here. These vents emit levels of CO2 that can be expected in the world’s oceans by the end of the century, making these waters a natural lab for scientists studying the impacts of ocean acidification on coral reefs. A coproduction with Open Boat Films.
Support Provided By

Unlock with PBS Passport
26:42
Florida’s gentle giants are dying in record numbers.

Unlock with PBS Passport
26:42
Experts are working to conserve and restore the Puget Sound’s declining kelp forests.

Unlock with PBS Passport
26:42
Scientists study the body size and health of humpback whales across their migratory cycle.

26:42
Experts study declines in the number of humpbacks migrating between Alaska and Hawaiʻi.

Unlock with PBS Passport
26:47
Scientists employ creative solutions to restore and reconnect Florida’s mangroves

Unlock with PBS Passport
26:47
The deep-sea submersible Alvin brings explorers to extraordinary places.

Unlock with PBS Passport
26:42
Scientists study salt marshes along scenic coastlines in the South.

26:42
Scientists team up with anglers to study the survival rates of the fish.

Unlock with PBS Passport
26:53
Scientists study what makes certain corals more resilient than others.

Unlock with PBS Passport
26:42
Scientists monitor penguin populations and study the animals’ interaction.

Unlock with PBS Passport
26:42
Scientists study the devastating impacts of the Deepwater Horizon oil rig disaster.

Unlock with PBS Passport
26:42
Scientists set out to uncover the mysteries of blue holes.