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Northwestern University says these are the world's smallest human-made flying structures, and they could be used for monitoring the environment, population surveillance or disease tracking.

The symptoms, such as headache, fatigue and cognitive dysfunction, persist or recur months after diagnosis, far more often than they do for the flu, researchers say.

Pennsylvania has an open Senate seat for the first time in 12 years. While the Democratic race was easily decided, the Republican primary looked like it's headed for a recount.

Women in Afghanistan continue to experience more restrictions under the Taliban, including the return of the burqa. NPR's Scott Simon notes how the world seems to be distracted from their plight.

Laparascopic surgery can be faster, safer and cheaper, but patients don't always get the choice even if it's appropriate, a study finds. Using it more often would reduce complications and save money.

In order to get the tax advantages of a health savings account, the health plan it's linked to has to meet several certain criteria. Consumers with a health savings account may also be on the hook for the entire cost of medical care, except preventive care.

The seniors of tomorrow will have much higher rates of diabetes and obesity than the seniors of today, according to a data analysis. That means higher medical bills for them — and for taxpayers, too.

With Saturday's 77-76 victory, North Carolina is one step away from the chance at a redemptive title after losing at the buzzer in last season's championship game. They'll face Gonzaga Monday night.

On an app that allows users to remain anonymous, the person warned black students to stay off campus. The University of Missouri said the suspect was apprehended off campus.

"The first day was great," one passenger says. "The second day we were watching a musical and everything started sliding."