Season 39

    Video thumbnail: NOVA Inside the MegastormPassport

    NOVA

    Inside the Megastorm

    Explore what made Megastorm Sandy so much more devastating than other hurricanes.

    Inside the Megastorm

    Video thumbnail: NOVA Mystery of Easter IslandPassport

    NOVA

    Mystery of Easter Island

    A team tests a theory on how the ancient stone statues were moved, using a 15-ton replica.

    Mystery of Easter Island

    Video thumbnail: NOVA Secrets of the Viking Sword

    NOVA

    Secrets of the Viking Sword

    A modern-day swordsmith reverse engineers the ultimate weapon of the Middle Ages.

    Secrets of the Viking Sword

    Video thumbnail: NOVA Why Ships SinkPassport

    NOVA

    Why Ships Sink

    Are you safe aboard a modern cruise ship?

    Why Ships Sink

    Video thumbnail: NOVA Deadliest TornadoesPassport

    NOVA

    Deadliest Tornadoes

    Why was the 2011 tornado season in the U.S. so extreme, and why did so many die?

    Deadliest Tornadoes

    Video thumbnail: NOVA Separating TwinsPassport

    NOVA

    Separating Twins

    Follow the story of twin girls joined at the head, as surgeons prepare to separate them.

    Separating Twins

    Video thumbnail: NOVA Secrets of the SunPassport

    NOVA

    Secrets of the Sun

    New tools let scientists better grasp our star's potentially destructive solar storms.

    Secrets of the Sun

    Video thumbnail: NOVA Hunting the Elements

    NOVA

    Hunting the Elements

    A two-hour special from the producers of "Making Stuff"

    Hunting the Elements

    Video thumbnail: NOVA Ice Age Death TrapPassport

    NOVA

    Ice Age Death Trap

    Experts uncover a site in Colorado packed with fossil mammoths and other extinct beasts.

    Ice Age Death Trap

    Video thumbnail: NOVA Mystery of a MasterpiecePassport

    NOVA

    Mystery of a Masterpiece

    Experts investigate whether a portrait sold for about $20,000 in 1998 is a lost Leonardo.

    Mystery of a Masterpiece

    Video thumbnail: NOVA 3D Spies of WWIIPassport

    NOVA

    3D Spies of WWII

    The allies used special arial photos to deal a blow to the Nazi rocket program.

    3D Spies of WWII

    Video thumbnail: NOVA Bombing Hitler's DamsPassport

    NOVA

    Bombing Hitler's Dams

    Can experts recreate an Allied attack from WWII and destroy dams with a bouncing bomb?

    Bombing Hitler's Dams

    Video thumbnail: NOVA Deadliest VolcanoesPassport

    NOVA

    Deadliest Volcanoes

    How can we best prepare for the most lethal volcanic eruptions?

    Deadliest Volcanoes