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Personal rapid transit was supposed to be the future of public transport: lightweight pods on elevated tracks, on-demand destinations. But funding issues make cities reluctant to change course.

Arvind Thiruvengadam and colleagues at WVU got excited when they won a grant in 2012 to test emissions on a few diesel cars. He figured the data might result in some papers a few people might read.

After being made available for free online, they're now fetching $150. The sellers apparently missed Francis' sermon this summer calling the "unfettered pursuit of money" the "dung of the devil."

The terms are a source of confusion. While Tahla Deiry may not like being called a refugee, according to the U.N. High Commissioner for Refugees, she is one because she fled armed conflict.

On a remote Arctic island, there's an underground vault filled with seeds. Now, for the first time, scientists are about to retrieve some of those seeds to replace a collection trapped in Syria.

As an aspirant to the Republican presidential nomination, the businessman/entertainer reminds some people of notable politicians of the past.

What does it mean to U.S. politicians when the Pope calls for an end to income inequality, an attack on Climate Change and respect for religious freedom? Renee Montagne asks NPR's Tom Gjelten.

In a speech before a joint meeting of Congress, the Catholic Church leader offered words threaded heavily with politics. For analysis, Renee Montagne speaks with NPR's Don Gonyea.

Acclaimed film writer-director Richard Curtis has lured a superstar cast — including Queen Bee and Stephen Colbert — for a free Central Park concert to get people excited about fixing the world.

The pope spoke for 51 minutes before Congress and read his speech verbatim from prepared remarks. That is, except for one line he omitted about politics not being "a slave to the economy and finance."