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Women with dense breasts are more likely to get cancer and less likely to catch it early on a mammogram. But degree of density matters too, a study finds, as do other factors like family history.

What if microbes could ferment sugar into narcotics, like the way yeasts make beer? That day is quickly approaching. This week scientists report all the steps needed to make morphine in yeast.

Last month, the U.S. Alcohol and Tobacco Tax and Trade Bureau approved a powdered alcohol product, making both parents and lawmakers nervous. Some states have already banned powdered alcohol. NPR's Arun Rath speaks with Brent Roth of Wired, who made his own powdered concoction and put it to the test.

In her new book, social researcher Wednesday Martin examines the sometimes puzzling culture of motherhood in that most exotic of locales — Manhattan's Upper East Side.

"Red notices" named two former senior FIFA officials and several executives indicted by the U.S. Meanwhile, South Africa denied that it issued $10 million in bribes to host the 2010 World Cup.

It doesn't have a lot of high-tech companies, but the city is interested in attracting young tech entrepreneurs. Detroit's rents are far more affordable, but then there are the brutally cold winters.

More than 32,000 people die each year in the United States in gun-related suicides, violence and accidents. The physicians seek universal background checks and other measures to reduce the toll.

A hot wind blows from the Sahara Desert across West Africa each winter. This year, the clouds of sand are so thick that flights are grounded, cocoa trees are suffering and everyone has a cough.

Two months after Congress held hearings on President Obama's proposal for an authorization of military force against the self-declared Islamic State, Congress has done precisely nothing.

In Michigan's orchard country, extreme heat and cold can mean disaster for fruit growers. Now some are using a new twist on old technology to fool trees when sudden, unexpected weather changes occur.