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?