Weekend Edition

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SCOTT SIMON, HOST:

There's an article by three British scientists in the scientific journal Physical Review Letters that says, in part: A general continuum theory for the distribution of hairs in a bundle is developed treating individual fibers as elastic filaments with random intrinsic curvatures, applying this formalism to the iconic problem of the ponytail. The iconic problems of the ponytail? Where's the problem? Who better to explain than our math guy, Keith Devlin of Stanford University?

Keith, this is for real?

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SCOTT SIMON, HOST:

The Greek economy continues to suffer. It's been another painful week for that country starting Sunday when thousands of people demonstrated outside of parliament, and rioters torched buildings in Athens. Greek lawmakers passed harsh new austerity measures despite those protests, and still, Greece's European partners refused to approve the new bailout that the Greeks need to avoid default. NPR's Eric Westervelt reports what EU finance ministers will be considering when they meet again on Monday.

UNIDENTIFIED WOMAN: (Greek spoken)

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The best bobsled racers in the world are in Lake Placid, New York this weekend, competing in the World Championships. There's big drama this year for the American team. After capturing a historic gold medal two years ago at the winter Olympic Games in Vancouver, the U.S. has struggled, and lost ground to the Europeans. As North Country Public Radio's Brian Mann reports, American sledders hope to prove on their home track that they can still compete.

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You're listening to WEEKEND EDITION from NPR News,

Goats bleat. But a new study says: Not all in the same accent. Goats have accents, according to a new study from Queen Mary University in London. Now, a bleat from one group of goats sounds like this.

(SOUNDBITE OF A GOAT)

SIMON: But no other goat would apparently confuse that bleat with the accent of this goat.

(SOUNDBITE OF A GOAT)

(SOUNDBITE OF LAUGHTER)

SIMON: Any more than you'd confuse Kenneth Braunagh with Billy Bob Thornton.

Over the past half-century, the wild range of roles played by William Shatner has included a starship captain, a blowhard attorney and the man who can get you a deal on a hotel room.

Now, for the first time since John F. Kennedy was in the White House and James T. Kirk was just a glint in Gene Roddenberry's eye, Shatner has returned to Broadway and the stage.