Carfentanil, a powerful opioid used to sedate elephants, is being blamed for a record spike in drug overdoses in the Midwest. It's much stronger, and riskier, than heroin or fentanyl.

Smithsonian curators shipped some 100 pounds of souvenirs from the Republican and Democratic conventions — "great objects that engage issues for 2016" — back to the American history museum.

A beverage created in the laboratory now has a better-for-you organic version. But nutrition experts point out, this sports drink is still loaded with sugar and calories.

The U.K.'s vote to leave the European Union has forced businesses ranging from American automakers to financial services companies to ponder their investments in Europe.

The drought has farmers looking for ways to use less water. Among them, growing feed indoors using hydroponics — a new diet that's making the sheep pretty happy.

Even as China presses ahead with a military buildup in the South China Sea, the U.S. invited it to take part in the world's largest naval exercise at Pearl Harbor in Hawaii.

Serious algae outbreaks have hit more than 20 states this summer. Algae blooms aren't unusual. But the frequency, size and toxicity now are worse than ever, and changes in climate are partly to blame.

The focus has often been on U.S. military action in the Middle East. But diplomacy is also critical. Here's a look at one of America's most important and complicated relationships in the region.

As students head back to school, districts are faced with the age-old problem of making sure they show up. A principal in St. Louis resorted to extreme measures: installing washers and dryers.

Surfers once deemed man-made waves weak and mushy compared to the best that break along the coast. Then engineers and an 11-time world champion surfer showed just how good an artificial wave can be.