What's the median age in Africa? To find out, take our quiz. Above: Crowds wait for a festival in Maiduguri. Bonus question: Where is Maiduguri? Answer: It's the capital of Boron State in northeastern Nigeria. Tim Graham/Tim Graham/Getty Images hide caption

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Tim Graham/Tim Graham/Getty Images

All Things Considered producer Becky Sullivan during her Jeopardy! appearance. YouTube hide caption

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What Happens When Your 'Jeopardy!' Response Goes Viral

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Ken Jennings, left, and Brad Rutter, right, applauded for Watson earlier in the competition. Carol Kaelson/AP hide caption

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Carol Kaelson/AP

Who Is The New Overlord?

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