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Organoids are bits of neural tissue that model human brain development. Their use in science makes some uneasy, in part because the brain is so closely tied to our sense of self.

Venezuela released a number of imprisoned high-profile opposition figures, activists and journalists, in what the government described as a gesture to "seek peace".

In a post on social media, Trump said a 10% tariff will take effect on Feb. 1, and will climb to 25% on June 1 if a deal is not in place for the United States to purchase Greenland.

Climate change is warming Europe, but scientists are also studying whether a weakened Atlantic current could make Britain colder, with Laurie Laybourne, director of the Strategic Climate Risks Initiative in southwest England.

Protein has taken over the packaged-snack aisles at the grocery store. But do you need extra protein in your chips and muffins?

Iranians made phone calls abroad for the first time in days Tuesday after authorities severed communications during a crackdown on nationwide protests that activists say killed at least 646 people.

NPR asks Michael McFaul, former U.S. ambassador to Russia, about President Trump's recent tough talk about Russian President Vladimir Putin. Trump said he's now considering new sanctions.

NPR's Scott Detrow speaks with retired four-star Gen. Wesley Clark about how history will remember Colin Powell. The former secretary of state has died at 84.

The second son of the late supreme leader keeps a low profile. But he's long been viewed as wielding his power behind the scenes, from crushing dissent to influencing presidential elections.

Hundreds of millions of dollars — and possibly billions — for the state's Medicaid program are in limbo as part of the Trump administration's crackdown on fraud.