Extras

    Video thumbnail: NOVA Earth from Space Preview

    NOVA

    Earth from Space Preview

    Detailed satellite images reveal the web of connections that sustain life on Earth.

    Earth from Space Preview

    Video thumbnail: NOVA The Looming Satellite Gap

    NOVA

    The Looming Satellite Gap

    Many Earth-observing satellites are nearing the end of their lives.

    The Looming Satellite Gap

    Video thumbnail: NOVA When Hurricane Sandy Went Rogue

    NOVA

    When Hurricane Sandy Went Rogue

    What started out as a tropical storm evolved into one of New York City’s worst nightmares.

    When Hurricane Sandy Went Rogue

    Video thumbnail: NOVA The Volga Trade Route

    NOVA

    The Volga Trade Route

    The Vikings may have trekked all the way to Iran in search of crucible steel.

    The Volga Trade Route