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The first humans cross into the Americas from Asia. They are believed to have walked across a land bridge between eastern Siberia and western Alaska.

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Corn, or maize, is developed as a staple crop in highland Mexico. Corn played a vital role in the success of the Aztecs, allowing their population to grow freely.

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The first civilized societies began to develop in the middle east by the Sumerians. They resided in the Mesopotamia, also known as the "cradle of civilization"

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Corn planting reaches present-day American southwest and it was heavily influenced by Pueblo culture.

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Norse Vikings discovered America after sailing on the Atlantic ocean and they settled in northeastern North America for a short time. Corn cultivation finally reached the Midwest and southeastern Atlantic seaboard.

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Cahokia, a settlement in Mississippi, reaches its peak. It was larger than a multitude of European cities, including London.

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Christian crusades arouse European interest in the East. Christian crusades put a lot of strain on the relationships of religions

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Marco Polo returns to Europe (Venice, Italy) after exploring Asia. He returned with many new ideas, such as paper money, coal eyeglasses and a complex postal system. Polo inspired explorers of future generations to start their own journeys.

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Spain becomes united after the Kingdoms of Castile and Aragon defeated the Emirate of Granada. The marriage of Ferdinand II of Aragon and Isabelle I of Castile sealed the unification.

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Bartolomeu Dias, a Portuguese mariner and explore, became the first European to round the southern tip of Africa. He demonstrated the most effective for ships in the open ocean west of the African coast.