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A doctor-scientist's long quest to help children with a rare form of brain cancer has led to the discovery that high levels of brain activity can make glioma tumors grow faster.

President Obama announced that a U.S. drone strike killed two hostages held by al-Qaida: one American and one Italian. Separate operations also killed two U.S. citizens who were members of al-Qaida.

Lo Porto was kidnapped in January 2012 soon after he returned to work in Pakistan. President Obama announced Thursday that the Italian aid worker was inadvertently killed in January in a U.S. strike.

He plays in Cleveland now, but when Dwayne Bowe heard that Betty Johnson, his favorite fan in Kansas City, had died, he flew in to pay his respects.

It was almost unthinkable at the time, but Hillary Clinton wouldn't be where she is today without taking the bold chance on running for a U.S. Senate seat in a state where she never lived.

The Nasdaq has closed at a new high. It last peaked just before the dot-com crash, and "Nasdaq 5,000" soon became code for stock market bubble. Does the record hold any of the same warnings today?

NPR has this tribute to the Hubble Space Telescope — a parody of Iggy Azalea's "Trouble."

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.

Companies are investing in more secure methods to verify people. But even biometrics — like fingerprints and voice recognition — can be defeated, and they raise privacy concerns.

Carleton Eyster walks up a sand dune toward the water at Moss Landing State Beach. He has binoculars around his neck and a scope mounted on a tripod in…