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The nerve agent that recently killed a woman and left a man hospitalized was discovered in a "small bottle." It is unclear where it came from and how it got into the man's house in Amesbury, England.

A garden snail with a rare genetic condition can't mate with normal snails; scientists launch an international search for a mate; two possible mates are found. But they mate with each other instead.

The cartels that run the ivory trade try to cover their tracks — among other things, they smuggle tusks from the same elephant separately. But DNA testing can help find patterns.

Things are heating up in the 50th Congressional District race with a pointed ad against indicted Congressman Duncan Hunter from his democratic challenger Ammar Campa-Najjar.

Blacks and Hispanics are exposed to higher levels of air pollution than whites, yet whites consume more of the goods and services that cause it, according to new research.

"I'm sorry that I hurt people," the comic said, referring to anti-gay tweets he had posted years earlier. He had initially refused to apologize, only to announce hours later that he was stepping down.

Adrian Lamo was a hero in the hacker community for years. Everything changed when he began exchanging messages with U.S. Army intelligence analyst Chelsea Manning.

Memory faltering as you age? Parts of your brain that used to work in sync may be out of step. A study shows that a precise jolt of electricity can bring these parts back together, boosting memory.

American medical schools have historically been disproportionately white, but they are starting to attract more diverse students. The change may be the result of a diversity policy with teeth.

The nine-year period ending in 2014 saw a sharp increase in the U.S. of alcohol-related visits to emergency rooms, a study finds. And binge-drinking doesn't completely explain it.