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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.

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.

A Norwegian organization says that two seismic networks it oversees saw an explosion at the war-torn Kakhovka dam in Ukraine around the time it failed.

Speaker Nancy Pelosi is calling for bipartisan support for the upcoming House vote on the Senate-amended legislation. Such support is unlikely, as Republicans are fiercely opposed to the package.

The first lady was greeted by dancers, drummers, children waving flags and the first lady of Ghana, getting red-carpet treatment on her first trip overseas without the president.

The 22-year-old star gymnast landed a double-double dismount from the balance beam that will now be known as the "Biles," and a triple-double that is being dubbed the "Biles II."

"We wanted to help others," a survivor tells Reuters. "There was nothing we could do." The victims were mostly children whose escape was blocked.

The disgraced former U.S. congressman pleaded guilty in May to sending obscene messages to a 15-year-old girl. Court documents show that Weiner was aware the victim was a high school student.

The exodus of Venezuelans, trying to escape food and medicine shortages, has been called "one of Latin America's largest mass-population movements in history."

"As time went by, the cars got buried," said a driver. "I was really scared." Japan's Self-Defense Forces distributed food, blankets and fuel to the stranded and worked with shovels to free vehicles.

The Alaskan city just had its hottest and driest June ever, with average daily temperatures 5 degrees above normal. Crews are also battling wildfires across the state.

Eyewitness images and satellite pictures show oil that seeped from tanks at a major storage terminal on the island's eastern side. The terminal's owner says it was damaged by Hurricane Dorian.

President Cyril Ramaphosa will argue that he has a mandate to unify the country and turn around the struggling economy. South Africa's stagnant unemployment rate is hovering at 27%.

The Ethiopian leader received the award for his efforts to bring an end to 20 years of war with neighboring Eritrea.

The Trump administration wants to cut both food aid to the poor and subsidies for the nation's farmers. Supporters of both programs are joining forces to fight the cuts in Congress.

The education secretary testified before a House subcommittee on the Trump administration's 2018 budget proposal, which calls for deep cuts to education.

Nigerian President Muhammadu Buhari has asked for more time away from the country to finish medical tests, as officials there continue to insist he's in perfect health

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.

The Farm Bureau's Thanksgiving report says the average cost of dinner for 10 people is $53.31. But don't cancel your meal yet: the cost for a turkey has already dropped since the survey was taken.