Talk of the Nation on WKNO HD-2

When Americans want to be a part of the national conversation, they turn to Talk of the Nation, NPR's midday news-talk show.

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NPR Story
12:00 pm
Fri February 17, 2012

Air Pollution Ups Risk Of Stroke, Impaired Memory

Two studies in the Archives of Internal Medicine suggest short and long-term exposure to air pollution can increase the risk of stroke and cognitive declines. Study author Jennifer Weuve discusses the results, and why particulate matter and gases like ozone may harm the body.

NPR Story
12:00 pm
Fri February 17, 2012

Where's The Cuttlefish

Duke biologist Sarah Zylinski wants to better understand how cuttlefish see the world. Like their relatives octopus and squid, cuttlefish are master camouflagers--and Zylinski says you can learn something about how they process visual information by testing how they change their skin patterns in relation to different backgrounds.

NPR Story
12:00 pm
Fri February 17, 2012

Approved Reactors Could Power Up Nuclear Industry

Federal regulators signed off on the construction and operation of two nuclear reactors at a Georgia plant. It's the first license to be granted for a new reactor in the U.S. since 1978. Nuclear expert Per Peterson discusses the reactors' design, safety features and what this means for the future of nuclear power.

NPR Story
12:00 pm
Fri February 17, 2012

Concrete's Role As A Building Block In History

In his book Concrete Planet, author Robert Courland discusses why the concrete first used by the Romans is more durable than the concrete used in most present day buildings. Plus, mineralogist Peter Stemmerman tells us about his invention, Celitement and why it is greener than Portland cement.

NPR Story
12:00 pm
Fri February 17, 2012

Digital Tools Help Document Vanishing Languages

Linguist David Harrison has travelled to remote corners of the world seeking the last speakers of endangered languages. Now, he's using digital tools to to record and revitalize these dying languages. At the AAAS meeting this week, Harrison unveiled 'talking dictionaries' for eight languages.

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