Season 8

Video thumbnail: Changing Seas Beneath the Bridge

Changing Seas

Beneath the Bridge

Florida’s Blue Heron Bridge is popular with divers because of its rich marine life.

Beneath the Bridge

Video thumbnail: Changing Seas Maug’s Caldera: A Natural Laboratory

Changing Seas

Maug’s Caldera: A Natural Laboratory

The Maug Islands are a natural laboratory for scientists studying ocean acidification.

Maug’s Caldera: A Natural Laboratory

Video thumbnail: Changing Seas Manatees: Conserving a Marine Mammal

Changing Seas

Manatees: Conserving a Marine Mammal

Each winter, scientists head to Crystal River, Florida, to study manatees gathered there.

Manatees: Conserving a Marine Mammal

Video thumbnail: Changing Seas Sponges: Oldest Creatures in the Sea?

Changing Seas

Sponges: Oldest Creatures in the Sea?

Are sponges the oldest creatures in the sea? DNA research has cast doubt on that theory.

Sponges: Oldest Creatures in the Sea?