Songhai Empire, more than 1,000 years old and from the 15th to the late 16th centuries one of the largest Islamic empires in history, was where?
During his career from 1959 to 1993, who battled more than 2,000 fires in oil and natural gas wells, notably in 1962 when he tackled a fire at a gas field in the Sahara nicknamed the Devil's Cigarette Lighter, a 450-foot (137 m) flame?
During the period from the 12th to 15th centuries CE, what was the land from the Gulf of Finland in the west to the northern Ural Mountains in the east (including the Lake Ladoga regions of modern Russia) known as?
