The Grand Ethiopian Renaissance Dam is under construction near Assosa, Ethiopia. When it's completed, the dam will have be able to produce 6,000 megawatts of electricity, making it the biggest hydroelectric power station in Africa.
It's not the real deal. This Ebola Treatment Unit was set up for a TED talk in Vancouver so people could get a sense of what the units are like, and what it's like to put on the protective suit.
Polina, 37, rests in a hospital bed in St. Petersburg, Russia, in 2011. She is severely malnourished and suffers from numerous diseases, including tuberculosis, hepatitis C and HIV.
Nigerian President Goodluck Jonathan speaks during the inauguration ceremony of the 750 megawatt power station in the southwestern Ogun state, Nigeria, last month. In an interview with the BBC Friday, he said he hopes to retake all territory seized by Boko Haram within a month.