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Countries in Africa, the Middle East and parts of Asia are counting more cases of vaccine-derived polio. Researchers are developing a new vaccine to try to end the spread of the wild type of virus.

They spent three years combing Louisiana's swampy woods with drones, cameras and audio recorders. They've got grainy photos and eyewitness accounts. The bird hasn't been definitively seen since 1944.

The receipt dates back to an exhibition in the 1950s. French artist Yves Klein charged money to see his so-called invisible art. He later sold the art for gold and gave receipts.

The U.S. is making the largest investment in history in the country's water system. In the rush to spend, some worry green projects will be overlooked.

NPR's Ailsa Chang speaks with journalist Deepa Fernandes about her two-part investigation for Latino USA into domestic violence survivors who lose their children to the foster care system.

Marking 100 years since its founding, China's Communist Party is trying to keep its revolutionary spirit alive. How? Training its cadres at party history boot camp.

The spaceflight company Blue Origin, founded by billionaire Jeff Bezos, has successfully completed its first flight into space with passengers aboard, including the Amazon founder himself.

A new epidemiological study suggests the death toll in India from COVID-19 could be as much as 10 times the official figure — making the count closer to 5 million people.

NPR's Sarah McCammon speaks with reporter Michael Fox about COVID-19 in Brazil. Earlier this month the country's death toll surpassed half a million, becoming the second highest in the world.

NPR's Sarah McCammon speaks with Tina Paul, vice mayor of Surfside, Fla., about the latest search and rescue efforts in the wake of a condominium that collapsed there last week. Dozens remain missing.