Extras

    Video thumbnail: The Amazing Human Body When Puberty Starts

    The Amazing Human Body

    When Puberty Starts

    What determines when we start puberty has until recently been a mystery.

    When Puberty Starts

    Video thumbnail: The Amazing Human Body Kate Burn, Ballerina

    The Amazing Human Body

    Kate Burn, Ballerina

    The story of how our body deals with damage and repair can be told through Kate's feet.

    Kate Burn, Ballerina

    Video thumbnail: The Amazing Human Body Danny McCaskill, Cyclist

    The Amazing Human Body

    Danny McCaskill, Cyclist

    Danny demonstrates how new motor skills must be learned and developed with practice.

    Danny McCaskill, Cyclist

    Video thumbnail: The Amazing Human Body Trailer

    The Amazing Human Body

    Trailer

    Explore the internal mechanics of the human body.

    Trailer

    Video thumbnail: The Amazing Human Body Recker Eans, Drummer

    The Amazing Human Body

    Recker Eans, Drummer

    What Recker does during this growing period will change the structure of his brain.

    Recker Eans, Drummer

    Video thumbnail: The Amazing Human Body Our Fears

    The Amazing Human Body

    Our Fears

    Fear is a learned behavior.

    Our Fears

    Video thumbnail: The Amazing Human Body Extreme Cold

    The Amazing Human Body

    Extreme Cold

    Our bodies respond quickly to survive in cold temperatures.

    Extreme Cold

    Video thumbnail: The Amazing Human Body Working Together

    The Amazing Human Body

    Working Together

    We learn to work together by reading the emotions and facial expressions of others.

    Working Together

    Video thumbnail: The Amazing Human Body From Day One, You Learn

    The Amazing Human Body

    From Day One, You Learn

    From an early age, we learn how to control the movements of our bodies.

    From Day One, You Learn

    Video thumbnail: The Amazing Human Body Freya Christie, Professional Tennis Player

    The Amazing Human Body

    Freya Christie, Professional Tennis Player

    Freya's bones in her racket arm have become thicker to cope with her intense workouts.

    Freya Christie, Professional Tennis Player

    Video thumbnail: The Amazing Human Body Building a Heart

    The Amazing Human Body

    Building a Heart

    Dr. Ott takes skin cells and reprograms them into stem cells.

    Building a Heart

    Video thumbnail: The Amazing Human Body Lew Hollander, Triathlete

    The Amazing Human Body

    Lew Hollander, Triathlete

    As Lew pushes himself, his body demands more oxygen to keep it going.

    Lew Hollander, Triathlete