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  Begins in 3 milion years BC and finish in 10000 BC when the agriculture begins.
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  Begins in 10000 BC and finish in 5000 BC with the discover of metals
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  Beggins in 5000BC when the humans discovered the metal and finish with the invention of writing in 2500 BC.
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  Begins in 2500 BC with the invention of writing and ends in 476 AC with the fall of Roman Empire.
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  Begins in 476 AC with the fall of Roman Empire and ends in 1492 AC with the discover of America.
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  Begins in 1492 AC with the discover of America and ends in 1789 AC with the French Revolution
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  Begins in 1789 AC with the French Revolution to the actuallity.
