Extras

    Video thumbnail: NOVA Harvesting Electricity from Sand

    NOVA

    Harvesting Electricity from Sand

    When it comes to generating power, shining light on silicon opens up many possibilities.

    Harvesting Electricity from Sand

    Video thumbnail: NOVA Treasures of the Earth: Power Preview

    NOVA

    Treasures of the Earth: Power Preview

    Drill underground to see the treasures that power our world—today and into the future.

    Treasures of the Earth: Power Preview