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Try to look inside the brain, and you're not going to get very far. But photoacoustic imaging may be a solution for the shortcomings of conventional imaging. It uses lasers to make the brain sing.

Police in Western Europe have rounded up suspected terrorists this week. NPR's Scott Simon talks to Raffaello Pantucci of the Royal United Services Institute about how countries track extremists.

Verlon Jose, vice chairman of the Tohono O'odham Nation, says President Trump's proposed border wall would cut through the reservation, with negative impacts.

As millions of acres of forests burn across the state this summer, there's growing concern about what impact that might have on permafrost — and how melting permafrost might affect climate change.

Police in France continue operations aimed at capturing people suspected of involvement in the recent terror attacks in Paris. Correspondent Eleanor Beardsley shares the latest with NPR's Scott Simon.

The Supreme Court announced Friday it would hear appeals this term from four circuit courts that ruled on gay marriage last year. NPR's Nina Totenberg and Scott Simon discuss the implications.

The first GOP presidential debate will be held next week. There are more than a dozen declared candidates but only those placing in the top 10 in an average of national polls will be invited.

Miami businesses expect an upsurge in trade and travel to Cuba under new rules, but travel for tourism is still prohibited and the island has only a limited number of hotel rooms.

Tiny Boonville, Calif., is known for a few things. Its wineries, its tight-knit community, and its very own language. Boontling was created in the late 1800s as a way to gossip covertly.

San Francisco requires health warnings on soda. The American Beverage Association sued — contending a warning label violates the First Amendment by interfering with the "free market of ideas."