Extras

    Video thumbnail: NOVA Making Steel From Trash

    NOVA

    Making Steel From Trash

    Could pieces of plastic garbage become the resource we need to construct buildings?

    Making Steel From Trash

    Video thumbnail: NOVA Treasures of the Earth: Metals Preview

    NOVA

    Treasures of the Earth: Metals Preview

    What is it about the nature of metals that have made them a pillar of human civilization?

    Treasures of the Earth: Metals Preview