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By analyzing layers in these teeth, scientists have pinpointed a critical window when baby brains are most vulnerable to toxic metals — and linked that to behavior problems later in life.

New Jersey's governor says a software error led to about 400 noncitizens voting in 2023 and 2024. NPR's Leila Fadel talks to David Becker of the nonpartisan Center for Election Innovation & Research.

One of the final steps in preparing for a marathon is a long run. First-timers and seasoned veterans gathered in Boston to test their readiness with a 20-mile group run.

Appalachia Mid-South Newsroom's Andrew Henderson went to an auction of items belonged by Harland Sanders, known as Colonel Sanders, to understand why people are so fascinated by the founder of KFC.

Scientists say that August was the hottest month ever recorded globally. In the U.S., summer temperatures also shattered heat records.

In the latest installment of our "Looking Ahead" series, Pulitzer Prize-winning journalist and former New York Times Middle East bureau chief Chris Hedges talks about the decisions that led him on his career path, and where he sees the country going in the next decade.

The country nearly eradicated this treatable sexually transmitted disease twice, only to see it come roaring back. The failure shows the weakness of a cash-strapped public health system.

For abortion-rights defenders, the fall of Roe v. Wade was a disaster in slow motion. That made the blow no less painful. Thirteen people with personal connections to the issue share their stories.

Investigators in Ukraine have opened more than 50,000 inquiries into alleged Russian war crimes since the war began. NPR looked into the death of one man to show the challenges investigators face.

Hillary Clinton clinches the Democratic presidential nomination. She becomes the first female presidential candidate for a major U.S. political party.