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Researchers found that rats experiencing positive emotions had an increased pinkish hue on their ears, like the animal on the left. The animal on the right is from the control group. Plos One hide caption

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Plos One

Comparative psychologist Claudia Fugazza and her dog demonstrate the "Do As I Do" method of exploring canine memory. Mirko Lui/Cell Press hide caption

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Mirko Lui/Cell Press

Your Dog Remembers Every Move You Make

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On display at ZooAve Animal Rescue in Alajuela, Costa Rica, Grecia, the chestnut-mandibled toucan, can now eat on its own and sing with the new beak. Grecia was in rehabilitation for months after receiving a 3-D-printed nylon prosthesis. Carrie Kahn/NPR hide caption

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Carrie Kahn/NPR

After Losing Half A Beak, Grecia The Toucan Becomes A Symbol Against Abuse

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