The West African metropolis has hit 21 million, surpassing Cairo.
A trick for keeping residents of sweaty cities cool.
Protesters decried the most recent ruling on deposed leader Hosni Mubarak.
A city celebrates its first free election in 30 years.
Themed real estate developments have spread urban mimicry all over the world. But why do we want these places?
A side-by-side comparison of 15 major metro areas.
International smugglers have tried to bring cow brains into Egypt four times in the past two weeks
A new documentary follows a family of Coptic Christians, one of thousands who tend to the city's trash
Sana'a could literally run out of water by 2017. And so far, very little has been done