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The International Mathematical Union has announced the four winners of its prestigious Fields Medal. The group includes Maryam Mirzakhani, the first woman to win the prize in its long history.

The man running third in the race to be Brazil's next president has died in a plane crash. Eduardo Campos' small plane crashed in bad weather south of Sao Paulo as it was preparing to land.

Quinoa, once a homebody crop, crossed the Atlantic for the first time this century. Now the Food and Agriculture Organization has a hunch it can thrive in Central and Southwest Asia.

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.

Even just the word Ebola is kind of terrifying. Why? Hollywood has a lot to do with it. But Ebola outbreaks also have all the ingredients for what one psychologist calls the "dread factor."

Faulting the U.S. approach to hostage situations like the one his brother, James Foley, was in, Michael Foley says, "We are sitting on prisoners in Guantanamo. It doesn't even have to be financial."

Pentagon spokesman Rear Adm. John Kirby said the Chinese warplane made several close passes by an American P-8 Poseidon, doing a barrel roll and flying wingtip to wingtip in an "aggressive" manner.

Deputy National Security Adviser Ben Rhodes said the beheading of American journalist James Foley is tantamount to an act of terror against the U.S.

There are countless programs to help veterans readjust to civilian life. One of the most unusual is in San Diego, where vets get together in a caged boxing ring and punch each other in the face.

As the situation quiets down in Ferguson, Mo., some political observers are asking why it took President Obama so long to publicly weigh in on events there.