Extras

    Video thumbnail: Ancient Skies Galileo's Discoveries

    Ancient Skies

    Galileo's Discoveries

    Take an in depth look at the celestial bodies discovered by Galileo.

    Galileo's Discoveries

    Video thumbnail: Ancient Skies Earth-Centered Cosmos

    Ancient Skies

    Earth-Centered Cosmos

    Explore Ptolemy's earth-centered model of the cosmos.

    Earth-Centered Cosmos

    Video thumbnail: Ancient Skies Episode 2 Preview | Finding the Center

    Ancient Skies

    Episode 2 Preview | Finding the Center

    Episode two charts our efforts to give the earth shape and place in the cosmos.

    Episode 2 Preview | Finding the Center

    Video thumbnail: Ancient Skies The Edge of the World

    Ancient Skies

    The Edge of the World

    Explore the Greek myth of Odysseus.

    The Edge of the World