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Lung surfactant coats tiny air sacs in the lung. Without it, every breath is a struggle, like blowing up millions of little balloons. With surfactant, breathing is as easy as blowing soap bubbles.

Australian scientists have reported that a spider — assumed to be the world's oldest — has died at 43, outliving its nearest rival by 15 years. The arachnid is believed to have survived for so long by sticking to one protected burrow its entire life and expending minimal energy.

In a statement Monday, the R&B singer's management referred to the #MuteRKelly campaign as "a public lynching." Burke counters that women affiliated with Time's Up are looking for accountability.

Former inspectors say documents obtained by the Israeli government may prompt a fresh look at the nation's nuclear sites.

Hyeonseo Lee left North Korea when she was 17. Now 38, she calls the recent meeting between Kim Jong Un and President Moon Jae-in "stunning," and says her greatest hope is reunification.

As the nation grapples with a crisis of opioid addiction, a medical device called the Bridge is being touted as a way to help people through the symptoms of withdrawal. Does it work?

Sweden's government said in a tweet that Swedish meatballs are actually based on a recipe King Charles XII brought home from Turkey in the early 18th century.

Six in 10 teachers in our poll say they have worked a second job to pay the bills.

The bill would make most abortions illegal after a fetal heartbeat can be detected. Republican Gov. Kim Reynolds has not said whether she will sign the measure.

Deputy Attorney General Rod Rosenstein has warned lawmakers against threatening the Justice Department after a draft of articles of impeachment against him was circulated on Capitol Hill.