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Northwestern University says these are the world's smallest human-made flying structures, and they could be used for monitoring the environment, population surveillance or disease tracking.

The symptoms, such as headache, fatigue and cognitive dysfunction, persist or recur months after diagnosis, far more often than they do for the flu, researchers say.

A roundup of key developments and the latest in-depth coverage of Russia's invasion of Ukraine.

Pennsylvania has an open Senate seat for the first time in 12 years. While the Democratic race was easily decided, the Republican primary looked like it's headed for a recount.

Actress and Day to Day contributor Annabelle Gurwitch talks with Walter Scheib, a former White House chef, about presidential food preferences. They also discuss the circumstances surrounding his official departure from the White House kitchen.

Álvarez hadn't lost a fight since 2013 across four different weight classes. But on Saturday night in Las Vegas, he met his match in the Russian light heavyweight champion Bivol.

Oklahoma has nearly $800 million from the National Telecommunications and Information Administration to expand broadband access across the state.

Bernie Speevack of Louisville, Ky., plays the puzzle with puzzlemaster Will Shortz and NPR's Lulu Garcia-Navarro.

The multi-instrumentalist and vocalist who co-founded the enormously influential German band Kraftwerk, died just a few days after his 73rd birthday.

Earlier this month, Jack Brewer, a former NFL player and a supporter of President Trump's reelection, was sued by the SEC. Now, he's set to speak at the Republican National Convention.

McDonald's says its account was "hacked by an external source." The tweet drew a wide range of responses — from pledges to eat a Big Mac today to calls for a boycott.

With Saturday's 77-76 victory, North Carolina is one step away from the chance at a redemptive title after losing at the buzzer in last season's championship game. They'll face Gonzaga Monday night.