Extras

    Video thumbnail: Secrets of the Dead Training Hannibal's Military Horses

    Secrets of the Dead

    Training Hannibal's Military Horses

    Uncover the mystery of how Hannibal crossed the near-impregnable Alps to attack Rome.

    Training Hannibal's Military Horses

    Video thumbnail: Secrets of the Dead How Hannibal's Elephants Crossed the Alps

    Secrets of the Dead

    How Hannibal's Elephants Crossed the Alps

    How did Hannibal's war elephants cross the Alps?

    How Hannibal's Elephants Crossed the Alps

    Video thumbnail: Secrets of the Dead An Attack in the Gorge

    Secrets of the Dead

    An Attack in the Gorge

    Uncover the mystery of how Hannibal crossed the near-impregnable Alps to attack Rome.

    An Attack in the Gorge

    Video thumbnail: Secrets of the Dead Hannibal in the Alps Preview

    Secrets of the Dead

    Hannibal in the Alps Preview

    Secrets of the Dead: Hannibal in the Alps Premiered Tuesday, April 10 at 8-9 p.m. on PBS

    Hannibal in the Alps Preview

    Video thumbnail: Secrets of the Dead A Peek at the New Discoveries Inside the Great Pyramid

    Secrets of the Dead

    A Peek at the New Discoveries Inside the Great Pyramid

    The team uses AR technology to see what the voids inside the Great Pyramid might look like

    A Peek at the New Discoveries Inside the Great Pyramid

    Video thumbnail: Secrets of the Dead Scanning the Pyramids

    Secrets of the Dead

    Scanning the Pyramids

    Solve a 4,500-year-old mystery with Secrets of the Dead, Scanning the Pyramids.

    Scanning the Pyramids

    Video thumbnail: Secrets of the Dead Muography Helps Scientists See Inside the Great Pyramid

    Secrets of the Dead

    Muography Helps Scientists See Inside the Great Pyramid

    Scientists use muography to create an internal scan of the Great Pyramid.

    Muography Helps Scientists See Inside the Great Pyramid

    Video thumbnail: Secrets of the Dead Scanning the Pyramids

    Secrets of the Dead

    Scanning the Pyramids

    Technology discovers new secrets inside the Great Pyramid at Giza.

    Scanning the Pyramids