6th millennium BC(7th millennium BC - 6th millennium BC - 5th millennium BC - other millennia
- Irrigation in Mesopotamia ( 55th century BC)
- pottery at Mehrgarh in South Asia, circa 5500 BC.
- Agriculture appears in the valley of the Nile
- Rice cultivated in Asia
- Wheel and plough invented
- Temples founded in South Mesopotamia ( 52nd century BC)
- The Black Sea floods with salt water ca 5600 BC.
- September 1, 5509 BC - Date which the Byzantine Empire counted as day of creation of the world and beginning of their calendar. See:Estimates of the date of Creation.