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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.

Secretary of State John Kerry is asking China's government to help ease tensions on the Korean peninsula, where North Korea has issued threats of war as it tests its weapons systems. The top U.S. diplomat met with Chinese President Xi Jinping in Beijing two days before a North Korea-promised missile test.

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.

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.

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 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.

Every year, the Greenbuild conference showcases technology intended to make buildings more environmentally friendly. We hear a couple of examples from a top 10 list of new building products.

A Canadian company called Thoth Technology has patented a space elevator. The tower would rise some 12 miles into the sky, with a runway or launch pad on top.

In this week's roundup of top tech conversations and stories: how tech giants are flexing their muscles against government, Twitter's abandoned blocking policy, and how the tech empire is striking back against creeping government surveillance.

The indictment handed down Monday night by Brazil's top prosecutor makes Temer the first sitting president in the country's history to be charged with a crime. And the legal saga is far from finished.