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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.

The nearly $219 million project includes improvements to State Road 408 and several local roads.

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.

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.

Facing a Republican supermajority, Democrats are pushing bills on property insurance and housing costs, and calling for interstate insurance pooling, stricter oversight of government waste and targeted tax relief.

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.

Federal data shows post-pandemic student math scores are still down. Maine education officials are responding with a new effort to show students that math has real-world relevance.

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.