Anders Kelto

How many countries are in Africa? 1, 15, 54 or 122? Take our beginner's quiz and test your knowledge of the second-largest continent in the world.

Brown University student Sunil Tripathi disappeared just before the Boston Marathon bombing, and was accused of being involved in the attack. A new documentary looks at the effects of the allegation.

The U.S. territory implemented an unusual version of the Affordable Care Act. Insurers must offer coverage to everyone. But there's no mandate for people to buy it, and there are no subsidies to help.

A South African teenager got tired of waiting in the clinic for his grandparents' HIV meds. So he came up with a solution. All it took was a bicycle.