The rendering industry likes to call itself the world's oldest recycling system. Nearly 100 percent of the processed pig eventually gets used — as meat and in uses as varied as medicine and pet food. iStockphoto hide caption

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The Salt

'Everything But The Squeal': How The Hog Industry Cuts Food Waste

Large-scale hog operations get a bad environmental rap. But when it comes to processing the animals, the industry is a model of efficiency, making use of every last bit in sometimes surprising ways.

As the mayor of Cali, Colombia, epidemiologist Rodrigo Guerrero (left) meets with the police once a week to review murder statistics. Courtesy of Prensa Alcaldía de Calí hide caption

itoggle caption Courtesy of Prensa Alcaldía de Calí

Goats and Soda

A Doctor Turned Mayor Solves A Murder Mystery In Colombia

When Rodrigo Guerrero took office, he was shocked by the murder rate. It seemed logical to blame the drug cartels. But his epidemiologist's eye led him to a different culprit.

NPR's Robert Siegel and Michael Minielly, a Mercedes-Benz representative, drive a new S550 4Matic, which allows for semi-autonomous driving. Rob Ballenger /NPR hide caption

itoggle caption Rob Ballenger /NPR

All Tech Considered

Hands-Free, Mind-Free: What We Lose Through Automation

In The Glass Cage, author Nicholas Carr warns that the more we allow computers to make decisions for us, the more likely it is that we will forget how to make them ourselves.

These little robots, called BlabDroids, ask people questions and video record their replies. The footage will be used to create a documentary. Courtesy of Alexander Reben hide caption

itoggle caption Courtesy of Alexander Reben

13.7: Cosmos And Culture

Domesticated Robots And The Art Of Being Human

The work of roboticist and artist Alexander Reben forces us to confront our expectations when it comes to ourselves and our creations, says commentator Tania Lombrozo.

Gunnar Bragi Sveinsson, Minister for Foreign Affairs of Iceland, speaks during the 69th session of the United Nations General Assembly at U.N. headquarters on Monday. Seth Wenig/AP hide caption

itoggle caption Seth Wenig/AP

The Two-Way - News Blog

At U.N., Iceland Announces Men-Only Conference On Gender Equality

During a speech in front of the General Assembly Gunnar Bragi said the conference would focus on violence against women and would be "unique" because only men and boys are invited.

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Tiny Desk Concerts

With Chops And Passion, Bio Ritmo Makes Listeners Move Their Hips

The 10-piece salsa band has burnished its reputation on dance floors. So push some furniture out of the way, press play on this video, and enjoy.

"The key is to figure out what you're contributing," Joshua Bell says of playing chamber music. Eric Kabik/Courtesy of the artist hide caption

itoggle caption Eric Kabik/Courtesy of the artist

Deceptive Cadence

3 Lessons From The Violin Wunderkind Who Became A Master

At 46, Joshua Bell leads nine young musicians in the 30-minute HBO documentary Masterclass. Here, the violinist gives advice on finding yourself in the music.

A group of Swedish scientists who are fans of Bob Dylan's music made a bet 17 years ago to see who could work more of the folk singer's song lyrics into their scholarly articles. AP hide caption

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The Two-Way - News Blog

Swedish Scientists Square Off Over Who Can Sneak In Most Dylan Lyrics

It all started in 1997, when two professors from the Karolinska Institute in Stockholm published an article on flatulence titled, "Nitric Oxide and inflammation: The answer is blowing in the wind."

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