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NPR's Lulu Garcia-Navarro speaks to Jeremy Howard, a research scientist at the University of San Francisco, about how to decide what masks might be more effective in preventing COVID-19 infections.

False claims about COVID-19 vaccines are spreading widely on social media, researchers warn. They could undermine public health efforts to curb the pandemic.

On the United Nations' new Planetary Pressures-Adjusted Human Development Index, the United States drops 45 places from its overall ranking, a reflection of the country's outsize environmental impact.

A battle is being fought over who owns viral dance moves on Internet video apps. Black and Brown creators on Dubsmash say TikTok creators are profiting off their dance moves.

The Cold War-era turncoat became a believer in communism after he was captured in North Korea and went on to spy for the Soviet Union. He died Saturday in Moscow at the age of 98.

After three years of isolation and disease testing, the bulls are headed from Montana to tribes in Kansas, Wisconsin and Alaska. Buffalo were once the center of tribal economies and spiritual life.

The U.S. continues to lead the world in both cases and deaths, as states across the Midwest and South battle a surge in new cases.

As coronavirus cases spike in Iowa, tension is brewing between the governor, the state's large public universities and local campus communities over how to prevent the spread of the virus.

There’s a lot of COVID-19 data available through state and federal resources. But those numbers can be confusing or raise questions. That’s inspired...

The lifelong educator is the third Latino candidate Biden's put forward for a Cabinet post. On Wednesday, Cardona spoke of the challenges schools have faced this year: "I've lived those challenges."