The earliest iron technology in West Africa has also been found to be contemporary with or predate that of the Nile valley and North Africa, and some archaeologists believe that iron metallurgy was likely developed independently in sub-Saharan West Africa... 
jẹ́ alákòóso àgbà orílẹ̀-èdè Japan tẹ́lẹ̀.Ìtọ́kasíàwọn ara Japan.. 