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During sleep, the brain locks in existing memories and can even form new ones. Scientists say they are starting to understand how that happens. A midnight snack may interfere.

Maria del Rosario Cayetana Fitz-James Stuart had more titles than any other aristocrat in the world. She died today in Seville.

Baby Sesay was in a care center in a village in Sierra Leone, waiting to find out if she had Ebola. Our photographer took a picture. Two days later, she was gone.

Hiroshi Shimizu's remarks came in testimony to a Senate panel. U.S. regulators want the company to issue a nationwide vehicle recall. So far, the recall has been restricted to high-humidity areas.

Nearly three-quarters of Americans say their doctors use electronic records. The overwhelming majority of people aren't particularly concerned about the privacy of the information, an NPR poll finds.

The CIA plan calls for deleting the email of almost all employees after they leave the agency. But opponents say this would erase too many important documents. The example they cite: Edward Snowden.

Diabetes costs the United States $322 billion a year, or $1,000 for each American. That's 48 percent more than it was just five years ago.

Newly published research finds that common texting posture can put as much as 60 pounds of force on the cervical spine.

Several states allow doctors, in certain circumstances, to help terminally ill people end their lives. The emotionally charged issue is at the center of the latest Intelligence Squared U.S. debate.

Cattle theft has been making a major comeback. A drought in the West has meant higher beef prices, making cattle an attractive target for thieves.