Extras

    Video thumbnail: NOVA Exclusive: Edward Snowden on Cyber Attacks

    NOVA

    Exclusive: Edward Snowden on Cyber Attacks

    The former NSA contractor sat down with NOVA to discuss the future of cyber warfare.

    Exclusive: Edward Snowden on Cyber Attacks

    Video thumbnail: NOVA Balloon Animals

    NOVA

    Balloon Animals

    Hot air balloons let people soar into the sky, but they had their share of turbulence.

    Balloon Animals

    Video thumbnail: NOVA Do We Live in a Multiverse?

    NOVA

    Do We Live in a Multiverse?

    Could parallel universes exist? If so, what would they look like and how would they form?

    Do We Live in a Multiverse?

    Video thumbnail: NOVA Zombies and Calculus, Part 2

    NOVA

    Zombies and Calculus, Part 2

    You're being chased by zombies, and understanding tangent vectors may save your life.

    Zombies and Calculus, Part 2

    Video thumbnail: NOVA Secrets of Urban Archaeology

    NOVA

    Secrets of Urban Archaeology

    Urban archaeologists dig for stories beneath city streets.

    Secrets of Urban Archaeology

    Video thumbnail: NOVA Knotty Thrills

    NOVA

    Knotty Thrills

    Three physicists untie a 150-year-old tangle of a puzzle.

    Knotty Thrills

    Video thumbnail: NOVA 2.5 Ways to Die in a Black Hole

    NOVA

    2.5 Ways to Die in a Black Hole

    The answer to how you would die in a black hole could revolutionize the laws of nature.

    2.5 Ways to Die in a Black Hole

    Video thumbnail: NOVA Carnivorous Plants and Killer Ants

    NOVA

    Carnivorous Plants and Killer Ants

    Ant eats plant's parasites. Plant eats ant's poop. It's the circle of life.

    Carnivorous Plants and Killer Ants

    Video thumbnail: NOVA 16th Century Nose Jobs

    NOVA

    16th Century Nose Jobs

    Thinking about getting a nose job? Thank goodness it's not the 16th century.

    16th Century Nose Jobs

    Video thumbnail: NOVA Energy Defined

    NOVA

    Energy Defined

    What is energy and why are we on a never ending search for new energy sources?

    Energy Defined

    Video thumbnail: NOVA Wind Power

    NOVA

    Wind Power

    Modern wind turbines capture energy from the wind and convert it into electricity.

    Wind Power

    Video thumbnail: NOVA Toward a Smarter Grid

    NOVA

    Toward a Smarter Grid

    What can be done to make the power grid more reliable and efficient?

    Toward a Smarter Grid

    Video thumbnail: NOVA A Never Ending Supply

    NOVA

    A Never Ending Supply

    What makes an energy source renewable and how can we use them to power our societies?

    A Never Ending Supply

    Video thumbnail: NOVA Growing Appetites, Limited Resources

    NOVA

    Growing Appetites, Limited Resources

    The need for alternative energy sources is more pressing than ever.

    Growing Appetites, Limited Resources

    Video thumbnail: NOVA Solar Power

    NOVA

    Solar Power

    How can we convert the Sun’s light and heat into energy we can use?

    Solar Power

    Video thumbnail: NOVA The Tongue-Eating Parasite

    NOVA

    The Tongue-Eating Parasite

    Gross science: This parasite crawls into a fish’s mouth and replaces its tongue.

    The Tongue-Eating Parasite

    Video thumbnail: NOVA NOVA Elements iPad App

    NOVA

    NOVA Elements iPad App

    Explore an interactive periodic table, play an elemental game, and watch the NOVA program.

    NOVA Elements iPad App

    Video thumbnail: NOVA Light My Fire

    NOVA

    Light My Fire

    What do you get when you introduce a chunk of Sodium to a Bunsen burner? Sizzling romance.

    Light My Fire

    Video thumbnail: NOVA The Higgs Particle Matters

    NOVA

    The Higgs Particle Matters

    Learn how Peter Higgs' ideas about matter transformed our understanding of space.

    The Higgs Particle Matters

    Video thumbnail: NOVA The Making of the

    NOVA

    The Making of the

    Take a behind-the-scenes look at this animated scene from "The Fabric of the Cosmos."

    The Making of the

    Video thumbnail: NOVA Finding Earth-Like Planets

    NOVA

    Finding Earth-Like Planets

    Learn how to find signs of extraterrestrial life in our galaxy without leaving home.

    Finding Earth-Like Planets

    Video thumbnail: NOVA An Interview With Steve Jobs

    NOVA

    An Interview With Steve Jobs

    Watch a rare interview with the late Apple visionary, conducted in 1990.

    An Interview With Steve Jobs

    Video thumbnail: NOVA Heisenberg Humor

    NOVA

    Heisenberg Humor

    Quantum mechanics is nothing to laugh at. Well, sometimes it is.

    Heisenberg Humor

    Video thumbnail: NOVA Reflections on the 9/11 Memorial

    NOVA

    Reflections on the 9/11 Memorial

    Visitors to the newly opened 9/11 memorial share their impressions.

    Reflections on the 9/11 Memorial