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Conventional wisdom holds that men prefer younger women as mates because they're more fertile than older women. But a mathematical analysis suggests that this preference may be the cause of menopause rather than a consequence of it.

Scientists were surprised to find that people who have had a concussion or other traumatic brain injury are more likely to have a stroke in the next few years. That's particularly true for people under age 50. But scientists don't know for sure if the brain injuries are the cause of the strokes.

A British cheesemonger wants to translate a French guide to raw milk microbiology into English. She says it has the potential to revolutionize our approach to cheese flavor and safety.

Eric Holder said federal investigators have already conducted interviews with eyewitnesses to the shooting of an unarmed black teenager in a St. Louis suburb.

Amid accusations of abuse, many in Ferguson, Mo., and cities around the country are calling for police to wear cameras. Cameras may not always be as impartial as people expect, however.

After 12 years as Turkey's prime minister, Recep Tayyip Erdogan is poised to jump to the president's office in Sunday's election. Secular Turks fear he will push the nation toward autocracy.

The Redcoat Band will no longer play "Tara's Theme" from the controversial film. And it already has an apt replacement in mind: the official state song, best known for Ray Charles' rendition.

After three days of destruction and violence, officials in Chicago have vowed to aggressively prosecute looters.

After his nephew was killed by police in 2016, Clarence Castile became a St. Paul, Minn., reserve police officer to understand the divisions. He speaks with NPR's Scott Simon about the experience.

The late-night violence occurs in the Flatbush neighborhood when police say a man approached an officer assigned to an anti-looting patrol and stabbed him in the neck.