NPR
: Talk of the Nation 
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
Where's Jimmy Hoffa? Everywhere And Nowhere
FBI agents believe they have a credible lead on the whereabouts of Jimmy Hoffa's body. If they're right, it will solve a longstanding mystery, which will also deflate Hoffa's resonance in popular culture.NPR
The Mystery Of the Ridiculously Pricey Bag Of Potatoes
Did a 10-pound bag of potatoes really cost $15 back in 2008? We get to the bottom of some puzzling numbers in the lawsuit alleging America's potato growers have become a spud cartel.NPR
Obama's Unplanned NSA Discussion
President Obama didn't expect he'd need to have a "national conversation" about government data-gathering.NPR
Teens Find The Right Tools For Their Social-Media Jobs
There was a time — a time long, long ago — when MySpace dominated the teen social-media world. Not anymore. NPR's Sami Yenigun looks at how teenagers use various social platforms in today's increasingly segmented online universe.Leave a Comment
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