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Itch can be a useful warning sign, or a maddening symptom with no cure. But the origins of itch have long been a mystery. Scientists think they've come closer to understanding the origins of itch in a molecule that makes mice scratch like mad.

Now that Hillary Clinton has suspended her campaign for the Democratic presidential nomination, the party is trying to heal its wounds from the brutal nominating contest. NPR's David Greene talks about what's next for Clinton and whether she can get her supporters to back Barack Obama.

Iowa's popular Republican governor's endorsement is highly coveted in the Iowa Caucus. A source familiar with the matter confirms Reynolds will put her political power behind Florida Gov. DeSantis.

A researcher shares examples of deception in the animal kingdom.

President Joe Biden has pledged to spend all of the military assistance funds Congress approved this year for Ukraine before the end of his administration on Jan. 20, 2025.

Trump says Americans should look to the stars, by sending astronauts to Mars.

The two leaders held talks after attending the key session of the Shanghai Cooperation Organization gathering in the port city of Tianjin, where discussions focused on regional stability, bilateral trade and energy cooperation.

The Biden administration is embracing health care efforts designed to reduce the deadly impact of fentanyl addiction, but many state legislatures are resisting the "harm reduction" approach.

President Xi Jinping kicked off the twice-a-decade summit with remarks that touched on COVID, Taiwan, economic policy and more. It is widely expected his rule will be extended beyond two terms.

Senator Hillary Clinton has suspended her campaign for the Democratic presidential nomination and is now endorsing former rival, Barack Obama. She spoke to supporters on Saturday in Washington.