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Mexico City has its worst smog in more than a decade. The government has ordered cars off the street one day a week, but city planners say that isn't a long-term solution.

Infrared thermal cameras have revolutionized the way rangers can see into the dark. But sometimes, experience trumps technology.

NPR's Robert Siegel talks with two students whose science projects were featured at the 2016 White House Science Fair.

An implant and wires that reroute nerve signals from a man's brain to his hand allow him to grasp and lift objects, after much practice. But easy, wireless signaling from the brain is still the goal.

The Chicago Police Department needs to acknowledge its racist history and use of excessive force, and it needs a major overhaul in the way it investigates officers and holds police accountable. That's according to a scathing report from a task force appointed by the city's mayor to issue recommendations for sweeping reform.

U.S. health officials say they are now convinced that Zika virus can target the developing brain before birth, leading to a severe type of microcephaly and other brain abnormalities.

When Kabul fell to the Taliban in August of 2021, thousands of Afghans flocked to the airport and tens of thousands more waited in desperation for a chance to flee.

Cat costumes, Chanel brides and a cockroach on the carpet: It's the Met Gala, baby.

Voter turnout for last year's elections was the second highest for a midterms since 2000, and close to half of voters cast ballots early or by mail, estimates from a Census Bureau survey show.

Zachariah Fike finds old military medals for sale in antique stores and on the Internet, tracks down the medals' owners, and returns them. So far, Fike — who earned a Purple Heart when he was wounded in Afghanistan on Sept. 11, 2010 — is 5 for 5.