Extras

    Video thumbnail: NOVA Are We Ready for a Cyber Attack?

    NOVA

    Are We Ready for a Cyber Attack?

    Cyber threats from nation states and lone hackers are a persistent threat to America’s cri

    Are We Ready for a Cyber Attack?

    Video thumbnail: NOVA Live Tweeting Ancient History

    NOVA

    Live Tweeting Ancient History

    The instant a key finding in human evolution was made, it was shared with the whole world.

    Live Tweeting Ancient History

    Video thumbnail: NOVA Dawn of Humanity Preview

    NOVA

    Dawn of Humanity Preview

    Deep in a South African cave, an astounding discovery reveals clues to what made us human.

    Dawn of Humanity Preview

    Video thumbnail: NOVA A Tsunami Strikes

    NOVA

    A Tsunami Strikes

    When an unimaginably colossal tsunami hits Fukushima, the results are catastrophic.

    A Tsunami Strikes

    Video thumbnail: NOVA Nuclear Meltdown Disaster Preview

    NOVA

    Nuclear Meltdown Disaster Preview

    Go inside the Fukushima power plants for the minute-by-minute story of what went wrong.

    Nuclear Meltdown Disaster Preview

    Video thumbnail: NOVA Chasing Pluto Preview

    NOVA

    Chasing Pluto Preview

    Watch as the New Horizons spacecraft captures our first clear view of Pluto’s icy surface.

    Chasing Pluto Preview

    Video thumbnail: NOVA A Pluto Flyby Dress Rehearsal

    NOVA

    A Pluto Flyby Dress Rehearsal

    See key moments in NASA’s Pluto Flyby, as previewed in a 3-D simulation.

    A Pluto Flyby Dress Rehearsal

    Video thumbnail: NOVA Secrets of Noah's Ark Preview

    NOVA

    Secrets of Noah's Ark Preview

    A team attempts to build the flood boat using inscriptions from an ancient clay tablet.

    Secrets of Noah's Ark Preview

    Video thumbnail: NOVA DNA-Testing Reef Diversity

    NOVA

    DNA-Testing Reef Diversity

    Marine biologist Laetitia Plaisance investigates species diversity in two coral reefs.

    DNA-Testing Reef Diversity

    Video thumbnail: NOVA Sea Butterflies in Danger

    NOVA

    Sea Butterflies in Danger

    Pteropod populations could decline or vanish due to rising ocean acidity.

    Sea Butterflies in Danger

    Video thumbnail: NOVA Lethal Seas Preview

    NOVA

    Lethal Seas Preview

    A unique coral reef in Papua New Guinea shows what the future may hold as oceans acidify.

    Lethal Seas Preview

    Video thumbnail: NOVA A Photomosaic of U-166

    NOVA

    A Photomosaic of U-166

    A high-res mapping expert pieces together thousands of images to make one wide shot.

    A Photomosaic of U-166

    Video thumbnail: NOVA Nazi Attack on America Preview

    NOVA

    Nazi Attack on America Preview

    A sunken German U-boat off the coast of New Orleans tells the story of Operation Drumbeat.

    Nazi Attack on America Preview

    Video thumbnail: NOVA The Great Math Mystery Preview

    NOVA

    The Great Math Mystery Preview

    Is math invented by humans, or is it the language of the universe?

    The Great Math Mystery Preview

    Video thumbnail: NOVA Colosseum: Roman Death Trap Preview

    NOVA

    Colosseum: Roman Death Trap Preview

    1500 years ago, how did the Romans engineer bloody spectacles and reenact sea battles?

    Colosseum: Roman Death Trap Preview

    Video thumbnail: NOVA Colosseum Building Blocks

    NOVA

    Colosseum Building Blocks

    The Colosseum was built in just several years due to a clever use of repeating arches.

    Colosseum Building Blocks

    Video thumbnail: NOVA Petra: Lost City of Stone Preview

    NOVA

    Petra: Lost City of Stone Preview

    How did early engineers carve tombs into rock cliffs and funnel water to this desert city?

    Petra: Lost City of Stone Preview

    Video thumbnail: NOVA Hagia Sophia: Istanbul's Mystery Preview

    NOVA

    Hagia Sophia: Istanbul's Mystery Preview

    How has this unique structure, built on a seismic fault, survived centuries of quakes?

    Hagia Sophia: Istanbul's Mystery Preview

    Video thumbnail: NOVA Sinkholes—Buried Alive Preview

    NOVA

    Sinkholes—Buried Alive Preview

    The catastrophic collapse of the ground beneath our feet is a growing worldwide hazard.

    Sinkholes—Buried Alive Preview

    Video thumbnail: NOVA Sunken Ship Rescue Preview

    NOVA

    Sunken Ship Rescue Preview

    A team of 500 engineers and divers struggle to raise the Costa Concordia cruise ship.

    Sunken Ship Rescue Preview

    Video thumbnail: NOVA The Universe, Asymmetry, and You

    NOVA

    The Universe, Asymmetry, and You

    The universe's symmetry was shattered by a quantum fluctuation, allowing life to exist.

    The Universe, Asymmetry, and You

    Video thumbnail: NOVA Big Bang Machine Preview

    NOVA

    Big Bang Machine Preview

    Explore the deepest mysteries of the early universe and the quest to find the Higgs Boson.

    Big Bang Machine Preview