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First dates. Local bands. College years. The word "nostalgia" is mentioned frequently in regard to our beloved haunts that shuttered long ago. But how do we form these special feelings for a place?

Watch as experts on income inequality discuss a recent NPR poll that is notable for capturing the views of the top 1% of earners in America. The webcast will be livestreamed at 12 p.m. ET Monday.

They're made of cotton. Or polyester. Or paper. Or polypropylene. Here's what researchers say about the effectiveness of the different types of face masks during this pandemic.

The COVID-19 crisis is throwing off the complex logistics of a year-long Arctic research expedition. A team set to rotate out may have to stay on board an ice-breaker for another six weeks.

Governors and mayors in some regions with rising COVID-19 counts have made masks mandatory in public places. But sometimes their own police refuse to enforce the mask rules.

Structures inside healthy brain cells nimbly move from one state to the next to perform different functions. But in certain degenerative brain diseases, scientists now think, that process gets stuck.

In a letter to the U.N., the president said the United States will terminate its relationship with the World Health Organization effective July 6, 2021. He was met with a barrage of criticism.

Scientists are getting closer to developing a wearable patch that can measure hydration and other health markers — in sweat. The hope is it could give athletes more data to boost their performance.

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Along with state polls, national polls may have been significantly further off from the election results than in 2016. Many appear to have missed support for Trump and down-ballot GOP candidates.