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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.

In the popular imagination, spinal taps get top symbolic billing when it comes to medically induced pain and foreboding. But a Mayo Clinic neurologist explains they are no big deal when performed properly.

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.

Morning Edition host Renee Montagne speaks with NPR music critic Ann Powers about singer Robin Thicke, who spent a decade recording smooth, sexy R&B before hitting the top of the pop charts with his current single, "Blurred Lines."

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.

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.

McDonald's is trying to hold down menu prices and keep options simple to speed up service while at the same time create pricier premium burgers and more sophisticated dining options.

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.

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.

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.