A relaxed, undrugged dog patiently waits its turn in the MRI scanner. The scientists' trick: Make it seem fun. Enikő Kubinyi/Science hide caption

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Enikő Kubinyi/Science

How A Dog In An MRI Scanner Is Like Your Grandma At A Disco

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What did she say? Eniko Kubinyi/Science hide caption

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Eniko Kubinyi/Science

Their Masters' Voices: Dogs Understand Tone And Meaning Of Words

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Sally Deng for NPR

Dogs Block President Carter's Dream Of Wiping Out Guinea Worm

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Ginger, an English bulldog, stands watch while at work with her owner, Will Pisnieski, at Authentic Entertainment in Burbank, Calif., in 2012. According to the Society for Human Resource Management, 7 percent of employers allow pets at work. Grant Hindsley/AP hide caption

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Grant Hindsley/AP

Who Let The Dogs In? More Companies Welcome Pets At Work

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Diabetes alert dogs are trained to detect low blood glucose in a person. The dogs can cost $20,000, but little research has been done on their effectiveness. Frank Wisneski/Flickr hide caption

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Frank Wisneski/Flickr

An image from a CHP video shows a Chihuahua leading officers on a chase across the Bay Bridge. California Highway Patrol/Screen shot by NPR hide caption

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California Highway Patrol/Screen shot by NPR

Shelter dog Rohan takes a break from his scent detection trials to play outside. Rohan is one of several dogs training to detect homemade bombs at the Canine Science Collaboratory at Arizona State University. Jimmy Jenkins/KJZZ hide caption

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Jimmy Jenkins/KJZZ

Dogs' New Challenge: Find A Bomb Before It Becomes A Bomb

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Cheryl Woolnough, director of training at Patriot PAWS in Rockwall, Texas, works with Papi, a Labrador retriever. Lauren Silverman/KERA News hide caption

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Lauren Silverman/KERA News

Veterans Say Trained Dogs Help With PTSD, But The VA Won't Pay

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The puppies in this litter are the first ever born through IVF Mike Carroll/Cornell University College of Veterinary Medicine hide caption

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Mike Carroll/Cornell University College of Veterinary Medicine