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For decades, we have known of only 14 convex pentagons that can do something called "tiling the plane." Now there is a 15th shape, but mathematicians are still far from knowing exactly how many exist.

The star of the The End of the Tour may be best known for his "bromance" films. "These kind of buddy movies are allowing men to open up a little bit," Segel says. Originally broadcast March 23, 2009.

David Simon's new HBO mini-series, Show Me a Hero, examines racial biases in New York City's public housing laws. Critic David Bianculli says, "This 25-year-old true story couldn't seem more timely."

Reggie Shaw's story is being told in the MTV series 'One Bad Choice.'

Chinese officials have not said what caused the explosions Wednesday in Tianjin, China. NPR's Robert Siegel talks with chemical risk expert David Leggett about the chemicals known to be at the site.

NPR's Robert Siegel speaks with Julie Rehmeyer, a contributing editor at Discover magazine, about a newly discovered pentagon.

Gasoline prices in the Midwest are up sharply even as oil prices head down. The problem is unscheduled repairs at a big BP refinery in Indiana.

NPR's Melissa Block speaks with Soufian Almobark, who fled Aleppo, Syria, about his difficult journey to the Greek island of Lesbos, and the squalid conditions in the camp.

Welcome to Valley Roundup. I’m Carolyn SackariasonJoining me this week are Randy Essex, editor of the Glenwood Post Independent, Lorenzo Semple, columnist…

Basalt residents may consider buying land downtown. But they won’t be able to vote until April. That’s because the measure would require raising taxes,…