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The Paleolithic is a period in the prehistory distinguished by the development of stone tools. It started 2,500,000 a.c and it finish 10,000 a.c.
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The Neolithic or New Stone Age, a period in the development of human technology, began around 10.200 BC in some parts of western Asia, and later in other parts of the world.
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Metal Age it occupies a very broad period in history characterized by the development of human societies of metallurgy. It is divided into three parts: the Copper Age, the Bronze Age and the Iron Age.
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The Antiquity is the period in which the scriptura is born and also the fall of the Roman Empire.
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It began in 477 with the fall of the Western Roman Empire and ended in 1492 with the discovery of America, or in 1453 with the fall of the Byzantine Empire.
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The modern age ends with the French revolution o en el fin de la década previa, tras la independencia de los Estados Unidos (1776)
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Contemporary Age is the name that designates the period between the Declaration of Independence of the United States or the French Revolution, and the actuality.