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Spanish scientists have identified the specific gene in yeast that's responsible for the foamy head on your glass beer. And that discovery could lead to what we've all been wishing for — more long-lasting foam on top of our ales of the future.

The Guardian Council, which vets all candidates, approved eight names, but left out an influential former president and a top aide to the current president. Their exclusion gives establishment-friendly candidates a clear path to the presidency in the June 14 election.

Democratic senators Dick Durbin and Tom Harkin went to Republican Rep. Steve King's Iowa district on Friday to refute his statement about "Dreamers" — young people brought to the U.S. by undocumented parents — that even some top Republicans called outrageous.

The Saudis accounted for a quarter of all sales by Germany. It's part of an emerging pattern of weapons purchases by Saudi Arabia and its neighbor United Arab Emirates. Both countries are major customers of the U.S., the world's No. 1 arms seller.

The Republican nominee's campaign says the Obama administration has sent mixed signals. President Obama's top aides say that's not so. That's likely to again be a point of disagreement during Tuesday's debate.

Most Super Bowl advertisers tried to crack up the TV audience with over-the-top antics, as is to be expected in the highly viewed event. But some of this year's best ads, as judged by experts and viewers, took a more somber tone.

Wichita State took down the first top-seeded team in the NCAA men's basketball tournament Saturday. It's the first time Wichita State is headed to the Sweet 16 since 2006. Plus, Harvard started Thursday on a high, but has since tumbled.

Gen. Martin Dempsey, the chairman of the Joint Chiefs of Staff, is responsible for reshaping the U.S. military after 10 years of war. At the same time, he's fighting to stave off the across-the-board cuts to the defense budget.

The Final Four tournament was a real nail-biter, coming amid controversy over huge salaries and reports of top recruits stolen. Professor Richard Vedder discusses college chess with NPR's Scott Simon.

Canada is still tops for Americans, Gallup says. But the polling company says attitudes toward other countries have shifted — particularly for North Korea and Russia.