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The winner of the 2021 Regeneron Science Talent Search is 18-year old Yunseo Choi for playing theoretical "matchmaker" using algorithms. She won $250,000.

Kansas is the overall No. 1 seed. North Carolina got another of the top spots. The other No. 1s, Virginia and Oregon, were considered surprises in some circles. The 68-team tournament starts Tuesday.

Andriy Yermak, top aide to President Volodymyr Zelenskyy, tells NPR's Steve Inskeep that Ukraine has an "urgent" need for sustained military aid.

NPR's Juana Summers talks with Washington Post reporter Alex Horton about internal documents from the National Guard assessing public sentiment about the federal takeover of Washington, D.C.

According to numbers released Tuesday, Twitter's one-year-old video-sharing app Vine now has about 40 million registered users. The app lets users shoot a maximum of six seconds per Vine, so we wanted to know why the limit's set at six seconds and not a second longer.

It's President Biden's first trip to Canada as president. He and Prime Minister Justin Trudeau are expected to discuss their concerns about the security crisis in Haiti.

Tuesday is the day Texans will decide who will be their party’s nominee in the November 2022 general election. At the top of the ticket are races for Texas governor and attorney general.

In addition to solving a case each week, Tommy features ongoing story lines involving the police chief's interactions with colleagues and family members. The scripts aren't fantastic — but Falco is.

A look at how two key issues this election season — inflation and the fight over abortion — are informing voters' midterm votes.

Ben Affleck's film is a dramatization of how Nike signed NBA rookie Michael Jordan in a legendary deal that would forever change the landscape of celebrity endorsements and professional sports.