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Two U.S. missionaries who caught the Ebola virus in Liberia have been discharged from an Atlanta hospital after fully recovering. They were the first known Ebola patients flown to the U.S. for treatment. Both received an experimental drug called ZMapp, but it remains unclear what role that treatment played in their recovery.

Older people whose visual acuity has slipped by just one letter on the eye chart are more likely to die sooner, researchers say. New glasses may be all it takes to maintain independence.

The execution of the American journalist James Foley by ISIS casts new attention on how news organizations cover graphic violence, and how they cover the risks taken by their own colleagues and peers.

Since the release of a video depicting the killing of American journalist James Foley, it has been revealed that the militant group Islamic State demanded millions of dollars for his freedom. Rukmini Callimachi of The New York Times explains how militant groups use ransom demands such as these for funding.

The violence at night in Ferguson, Mo., has calmed down for now. However, more than 160 people have been arrested since the protests began. Police records offer a sense of who they are.

The Pentagon didn't give enough notice to Congress and misused nearly $1 million when it swapped Army Sgt. Bowe Bergdahl for five Taliban leaders, the Government Accountability Office says.

The white trucks, which Moscow says are carrying only humanitarian aid, have been held up at the border for more than a week over fears they could be a ruse to resupply separatists.

An insurer denied free coverage for NuvaRing, a small birth control device that works for three weeks at a time by releasing hormones similar to those used by birth control pills.

Protesters were on the move. Soldiers fired. A teenage boy suffers wounds to both legs. For half an hour, no one could find an ambulance and no one came to care for him.

Looking for extraterrestrial smog may be a good way to search for alien intelligence, according to a Harvard researcher.