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Pea-size clusters of human cells called brain organoids inspire both hope and fear. Experts are debating how scientists can responsibly use these bits of gray matter.

President Trump's changing messaging, Congress' unprecedented demands and the Justice Department's piecemeal release of information haven't quieted the questions. Here's what we know — and don't.

President Trump's pressure campaign against Venezuela is the latest in a long saga of U.S. intervention in the region that is rooted in the 1823 Monroe Doctrine — and is a mix of success and failure.

About 40 people are dead and more than 100 are injured after a fire ripped through a New Year's Eve party at a Swiss ski resort bar. Authorities are still investigating what caused the blaze.

Ukrainians recall their country giving up nuclear weapons in 1994 in exchange for international security promises that weren't kept. They don't want a repeat in their current negotiations with Russia.

AI data centers require incredible amounts of energy to run. NPR's Planet Money investigates how that demand for power might affect your electric bills.

Archaeologists say they've unexpectedly found a huge Stone Age cremation pyre in southern-central Africa. The discovery is helping them understand the history of cremation.

Right-wing influencer's fraud claim leads to threats for Somali daycare owners, DOJ's initial release of Epstein files left many questions unanswered, dozens killed in Swiss Alps bar fire.

A right-wing media influencer accused Somali day care operators in Minnesota of defrauding the federal government. This has led to threats against staff and a federal child care funding freeze.

NPR's A Martinez asks Cindy Lehnhoff, director of the National Child Care Association, about the Trump administration's freeze on federal funding to help low-income families pay for child care.