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5500 BC

(7th millennium BC – 6th millennium BC – 5th millennium BC – other millennia

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Events:

• Agriculture appears in the valley of the Nile
• Rice cultivated in Asia
• Wheel and plough invented
• circa 5600 BC – The Black Sea floods with salt water. Some 3000 cubic miles (12,500 km&sup3) of salt water is added, significantly expanding it and transforming it from a fresh-water landlocked lake into a salt water sea.
• September 1, 5509 BC – day of creation of the world (according to the Byzantine Empire) and beginning of their calendar [1]
• circa 5500 BC – pottery at Mehrgarh in South Asia
• 5400s BC – Irrigation in Mesopotamia.
• 5100s BC – Temples founded in South Mesopotamia