Providing Support for PBS.org

Extras

    Video thumbnail: Breakthrough: The Ideas That Changed the World Discovering the Big Bang

    Breakthrough: The Ideas That Changed the World

    Discovering the Big Bang

    In 1923, Edwin Hubble began the manual process of photographing the Andromeda Nebula.

    Discovering the Big Bang

    Video thumbnail: Breakthrough: The Ideas That Changed the World How Far Are the Stars?

    Breakthrough: The Ideas That Changed the World

    How Far Are the Stars?

    How a New York property boom led to the discovery of the distance to the stars.

    How Far Are the Stars?

    Video thumbnail: Breakthrough: The Ideas That Changed the World Glass - A New Wonder Material

    Breakthrough: The Ideas That Changed the World

    Glass - A New Wonder Material

    Learn how clear glass was born - and gave us spectacles almost 800 years ago.

    Glass - A New Wonder Material

    Support for PBS.org provided by: