Extras

    Video thumbnail: First Civilizations Indus Valley Civilization

    First Civilizations

    Indus Valley Civilization

    Explore the splendor of the Indus Valley civilization.

    Indus Valley Civilization

    Video thumbnail: First Civilizations The Merchant's Seal

    First Civilizations

    The Merchant's Seal

    The merchant’s seal was a guarantee of quality goods.

    The Merchant's Seal

    Video thumbnail: First Civilizations Next on Episode 4

    First Civilizations

    Next on Episode 4

    Examine the civilizing effect of trade.

    Next on Episode 4

    Video thumbnail: First Civilizations Rise of International Trade

    First Civilizations

    Rise of International Trade

    Archaeologist Jeff Rose examines the history of a petroglyph in Oman.

    Rise of International Trade