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Extras

    Video thumbnail: NOVA Doomsday Volcanoes - Preview

    NOVA

    Doomsday Volcanoes - Preview

    Could the explosion of Iceland's ticking time bombs cause cold and famine worldwide?

    Doomsday Volcanoes - Preview

    Video thumbnail: NOVA Meet the Volcanoes

    NOVA

    Meet the Volcanoes

    Volcanoes can come in many shapes and sizes.

    Meet the Volcanoes

    Video thumbnail: NOVA A Volcanic Labyrinth

    NOVA

    A Volcanic Labyrinth

    See the only place on the Earth where scientists can study a volcano from the inside.

    A Volcanic Labyrinth

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