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Most antibiotics can't tell the difference between good and bad bacteria. That means medicines can kill helpful bacteria in your gut while they're obliterating the ones making you sick.

As Bernie Sanders fights on against Hillary Clinton, he has some goals short of the nomination in sight, while his supporters remain relatively reluctant to support Clinton.

Donald Trump called the last GOP convention boring. Now he's causing conflict, as liberal groups urge companies not to donate because of him.

The crash last week of an EgyptAir passenger plane flying from Paris to Cairo is not likely to help Egypt's battered tourism industry.

Dr. Margaret Chan, head of the World Health Organization, offered congratulations for victories on the health front — and words of serious concern about the future.

The Oversight Committee has criticized TSA for giving Kelly Hoggan bonuses despite security problems under his leadership. The agency has also been under fire for long screening lines for travelers.

The McCaugheys inspired awe and debate over fertility treatment when they were born more than 18 years ago. Now that they have graduated, the siblings plan to take different paths.

Lots of psychology studies fail to produce the same results when they are repeated. Does that mean we shouldn't trust science?

Britain's farming minister favors leaving the European Union. But some farmers fear losing subsidies and foreign workers if that happens. "As a farmer," says one, "I want to stay in business."

In the spring of 2015, a snowy owl named Baltimore was fitted with a backpack GPS transmitter. The data that transmitter collected over the past year shines a light on a mysterious species.