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With the right chemistry, cement can take on some of the properties of a metal, researchers report in the Proceedings of the National Academy of Sciences. Chris Benmore, a physicist at Argonne National Laboratory, explains why a semiconducting cement might be useful.

The new edition of the DSM, the so-called "Bible" of psychiatry, is out. But many psychiatrists and psychologists say the manual's approach is outdated, boxing mental illness into discrete categories like schizophrenia or bipolar disorder, when very little is known about the underlying causes of disease.

The East is a romantic activist outlaw fantasy in which Brit Marling plays an agent who poses as a radical activist to catch an eco-terrorist group. It's one of those melodramas in which someone on the morally wrong side has a spasm of conscience and maybe crosses over. Maybe.

If you're looking for a feel-good story of an upstart underdog, don't watch the NHL conference finals this weekend. But if you want to see a match up between the past four Stanley Cup champions, you won't want to miss this weekend's dropping of the puck. Sportswriter Stefan Fatsis joins Robert Siegel for a preview.

Robert Siegel speaks with political commentators E.J. Dionne of The Washington Post and Brookings Institution and David Brooks of The New York Times. They discuss the state of the GOP and President Obama's second term.

Dallas Green, once a member of the post-hardcore group Alexisonfire, now makes much quieter music on his own. His fourth solo album, recorded under the name City and Colour, is The Hurry and the Harm.

The New York Times reported this week that only 1 in 8 of New York's public high schools still has a student newspaper. National figures are only a bit better. NPR's Scott Simon says student newspapers are the latest victims of social media.

In 1971, the the EPA sent photographers around America to document the environmental state of the country. Forty years later, the agency is doing it again. Photographer Michael Philip Manheim talks about returning to some of the locations he photographed.

Weekend Edition Saturday host Scott Simon talks with NPR's Peter Kenyon about the latest on protests in Turkey's largest city that were met with police action including tear gas and fire hoses.

Next week, President Obama will meet with Chinese President Xi Jinping at an estate in California. Weekend Edition Saturday host Scott Simon speaks with Ken Lieberthal of the Brookings Institution about what issues the two world leaders are likely to discuss.