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The enamel on our teeth is the hardest tissue on the human body. A new study looks at the nanoscale structure of enamel from teeth dating as far back as 18 million years ago to see how it's changed.

The U.S. plays its final World Cup tune-up game Saturday against Germany before the soccer tournament begins next week. U.S. coaches are tinkering with lineup changes after a solid win over Senegal.

President Trump needs Congress to help him pass his agenda, but some of his more controversial moves may be getting in the way of his relationship with Republicans on Capitol Hill.

Myanmar's new military president visited India after a controversial election. Despite Western condemnation, the junta's confidence is growing both diplomatically and militarily.

NPR's Juana Summers speaks with Ben Gibbard, lead singer of Death Cab for Cutie, about the band's new album, I Built You A Tower.

Graham Platner is denying accusations of being physically rough with former girlfriends saying that report in The New York Times and other controversies are a sign his campaign is gaining momentum.

The federally-funded project focuses on the wildland-urban interface, where forests and nearby communities meet. Those areas can be especially vulnerable to wildfires.

The Utah Climate Center's Catherine Smith predicts clear skies and slightly above normal temperatures this week.

In 'Power Ballad,' a wedding singer played by Paul Rudd writes a hit — and a popstar makes it his.

The announcement was made by both countries Friday a day after North Korea unveiled a new facility to produce nuclear fuel.