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There is a winner in one of the country's biggest middle school science competitions: the Broadcom MASTERS. Ishana Kumar looked into how retinal fatigue may play a role in seeing "imaginary colors."

A data analyst listened to decades of Billboard's top tunes and discovered that a once-ubiquitous compositional tool, the key change, has all but disappeared from modern hits.

At the GOP debate in Miami, five Republicans sparred over top issues include the Israel-Hamas war, Ukraine, China, abortion and Social Security. Here's what you need to know.

Paying doctors to prescribe particular drugs is illegal. But drugmakers pay some doctors to talk with their peers about prescription drugs.

British Air Chief Marshal Sir Stuart Peach says the Kremlin's improved naval capabilities pose a risk to communications and Internet cables that would be an economic catastrophe if severed.

Last year an appeals court overturned the seven-year sentence against the controversial former Italian leader. Judges on the Court of Cassation backed that decision Tuesday.

Pakistani intelligence officials say Sangeen Zadran, a commander of the al-Qaida-linked Haqqani network, was killed in North Waziristan.

Just six of the remaining 12 Democratic candidates qualified for Tuesday night's debate, making it the smallest debate stage yet.

The founder of the far-right Oath Keepers antigovernment group, Stewart Rhodes, and four others go on trial Tuesday on charges of seditious conspiracy in connection with the Jan. 6 Capitol attack.

French forces killed the leader of the West African ISIS affiliate in a drone strike in southern Mali in August. French authorities described Adnan Abu Walid al-Sahrawi as "enemy No. 1" in the region.

Suicide killed more U.S. troops last year than combat in Afghanistan, a trend that's likely to continue this year. The causes and remedies are complicated, but Fort Bliss in Texas has bucked the trend. Suicides have declined there, after implementation of an interactive suicide prevention program.

NPR's A Martinez speaks with former U.S. Surgeon General Jerome Adams about the confirmation hearing for the nation's next likely top doctor.