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Unrelated lineages of electric fish all use the same small set of genes to create their voltage, a genetic search shows. Maybe the same genes could one day power pacemakers, bioengineers suggest.

In Texas and elsewhere, guns are playing major roles this campaign season. Politicians have opened fire in ads, literally, and embraced the gun as a symbol of their conservative street cred.

The fault that sparked a series of magnitude 7 earthquakes in 1811-12 had been thought dead, but the latest research suggests the region is still alive and kicking.

If Democrats lose control of the Senate this fall, it likely won't be for lack of campaign money. The prominent female candidates in particular have healthy campaign accounts.

Researchers were surprised to find that people with Type 2 diabetes who lost a lot of weight didn't lower their risk of heart attacks or strokes. They did have better control of their blood sugar and saw other health benefits.

On Sept. 18, Scotland votes on whether to break away from the U.K. Correspondent Ari Shapiro just returned from Scotland, and he tells NPR's Linda Wertheimer about the state of the campaign.

U.S. Senior District Judge Terence Kern said the state's constitutional amendment limiting marriage to opposite-sex couples violates the U.S. constitution. Gay marriages are on hold, however, pending an appeal.

The Labor Department says about 1.9 million people filed for unemployment last week, but there are some signs that people may be returning to their jobs.

In Miami, local officials have ordered a rollback of some reopening measures because of the region's soaring coronavirus cases. Gyms have to close and in-person dining at restaurants is prohibited.

Kim Davis, the Rowan County clerk in Kentucky, refused to issue any marriage licenses on Tuesday, saying she is waiting for the result of an appeal. Davis cited religious objections for her actions.