Here's a bit of good news for Medicare, the popular government program that's turning 50 this week. Older Americans on Medicare are spending less time in the hospital; they're living longer; and the cost of a typical hospital stay has actually come down over the past 15 years, according to a study in the Journal of the American Medical Association.

Twitter has started taking down jokes for copyright infringement. The removals were first spotted by @PlagiarismBad, which traced the takedown notices to Olga Lexell, a freelance writer in Los Angeles.

President Obama capped a five-day trip to Kenya and Ethiopia by becoming the first sitting American president to address the African Union.

In a speech intended for the entire continent and delivered from the AU headquarters in Addis Ababa, Ethiopia, Obama called on African leaders to create jobs and foster democracy. NPR's Gregory Warner reports that Obama spoke of Africa's bright future and called on leaders to end corruption and political intimidation.

Gregory filed this report:

NPR's Melissa Block speaks with Noreen Malone about her New York Magazine cover story. For the first time ever, the majority of the women who have accused Bill Cosby of sexual assault were photographed – 35 of the 46 who have come forward. There are also individual portraits with accounts from each of the women, which often include strikingly similar details.

Here at 13.7, we have have spent considerable time thinking about art and science. In particular we've often tried to unpack the meaning of their similarities.

During a meeting with all 27 members of the North Atlantic Treaty Organization on Tuesday, Turkey said it wanted to give the members a heads up that at some point it may need their help fighting against the self-declared Islamic State.

Turkey called a rare Article 4 meeting of the NATO allies after it began an air campaign against ISIS targets in Syria.

Cancer patients who do rehabilitation before they begin treatment may recover more quickly from surgery, chemotherapy or radiation, some cancer specialists say. But insurance coverage for cancer prehabilitation, as it's called, can be spotty, especially if the aim is to prevent problems rather than treat existing ones.

A mega-economic story is playing out globally. It involves U.S. interest rates, the Chinese stock market and jobs in Minnesota, Arizona and North Dakota.

And your wallet, too.

No kidding – it's all related. To see how, let your mind wander back.

Copyright 2015 NPR. To see more, visit http://www.npr.org/.

Everything from the blockbuster National Treasure to the TV series Sleepy Hollow has trafficked in the idea that America might not be exactly what it appears. Similarly, Austin Grossman's new novel, Crooked, imagines a United States founded not only on democracy and independence, but on the murky foundation of dark magic. But rather than handling this premise with a light, pulpy touch, Grossman's vision of the secret history of Richard M. Nixon is as eerie and absorbing as it is fantastically ludicrous.

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Walter Edgar's Journal

The Story of Catholic Hill

--- All Stations: Fri, Jul 31, 12pm | News Stations: Sun, Aug 2, 4pm --- (Originally broadcast 12/15/14) - The story of Catholic Hill in the Colleton County town of Ritter serves as a metaphor for black Catholics in South Carolina. While the Catholic Hill experience is unique in many respects, it is emblematic of the struggle for the faith in the way that the people of Catholic Hill maintained their identity despite decades of hardship and neglect. Professor Allison McCletchie, of Claflin University, is leading a small team that is creating an ethnography of Catholic Hill. She joins Dr. Edgar along with Catholic Hill native Davetta Greene to talk about the community's past and present.
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