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The Colorado seventh-grader was unimpressed by the options her parents had to test water in their home. So she created a sensor-based device using chemically treated carbon nanotubes to do it faster.

Service dogs help veterans with physical disabilities, and there's increased interest in using dogs for symptoms of post-traumatic stress disorder, too. A study is underway to see whether that helps.

Researchers analyzing recent drug spending in the U.S. say that high-priced drugs for rare diseases aren't having a widespread or significant effect on overall health care spending.

How will Trump respond to his 1995 tax records being out in the open? And when the vice presidential candidates meet on the debate stage will the echo their running mates?

"Everybody's got to get out there and find the piece that they can do," the Democratic Massachusetts senator says. She talks to NPR's Audie Cornish about her new book, the middle class and activism.

The Tennessee Republican may be a make-or-break vote on the GOP's top priority: tax cuts. And since Corker announced last week he's not running for reelection, he's speaking more freely on the issue.

In 1997, someone speared a pumpkin on the top of a 173-foot tower. It stuck around for months, an object of fascination and speculation. And no one knows who did it ... unless you know. Wait, do you?

The Women's World Cup is underway, while top tennis players are about to meet at Wimbledon.

House Speaker Nancy Pelosi warned President Trump not to intimidate the whistleblower, as the president continued to call for the anonymous person to be exposed.

David Holmes is a top staffer at the U.S Embassy in Ukraine. He overheard a phone call between the U.S. ambassador to the European Union and the president in which "investigations" were discussed.