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IV bags filled with what's called normal saline are used to treat problems ranging from vomiting to lightheadedness. But evidence for the use of saline over other intravenous options is scant.

We asked the experts to weigh in on the U.K. charity's new campaign that promises to put "local heroes" in the spotlight.

A self-driving car operated by Uber struck and killed a pedestrian who was walking her bicycle in Tempe, Ariz., Sunday night. It could be the first pedestrian death involving a self-driving vehicle.

French officials have been investigating claims that former President Nicolas Sarkozy took 50 million euros from the Libyan regime to fund his successful 2007 presidential bid.

The steady drop is expected to accelerate in coming years, threatening the much-lauded model through which the U.S. has paid for conservation.

The photo was taken years before the two met. And in the background, he was amazed to see himself. Posing for his own photo at the precise moment his future wife was doing the same thing.

The high court heard arguments on whether anti-abortion pregnancy centers, which can often appear to be abortion clinics, have to disclose more fully what they are, as required by California law.

Authorities in Texas believe a package explosion early Tuesday morning at a FedEx distribution center in San Antonio may be the latest blast linked to a series of explosions in Austin.

Also: Saudi Arabia's controversial Crown Prince meets President Trump today; Congress must pass a spending bill or the government faces a partial shutdown; and the last male Northern white rhino dies.

Togo ranked last in 2015's World Happiness Report. This year, it moved up 17 spots — the most improved country in the world. What's the perspective from the ground?