Penguin Cheerleaders Added To Animal Planet's Puppy Bowl

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Magellanic penguins strut their stuff on the rocky shoreline of Argentina's Punta Tombo, home to the largest colony of the birds in the world. Craig Lovell/Corbis hide caption

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Changing Climate In Argentina Is Killing Penguin Chicks

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A drilling site rises from the middle of farmland near Fairfield, N.D. Many farmers and ranchers are profiting from the state's oil boom, but others complain that drillers are interfering with their business. Jeff Brady/NPR hide caption

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Oil Rush A Cash Cow For Some Farmers, But Tensions Crop Up

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Piglets at Hilldale Farm in State Center, Iowa in March 2013, just before porcine epidemic diarrhea began spreading through hog farms in the U.S. Amy Mayer/Harvest Public Media hide caption

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The sexually transmitted cancer is common in street dogs around the world. Noel Celis/AFP/Getty Images hide caption

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A baby born too soon continues to develop and grow inside an incubator at the neonatal ward of the Centre Hospitalier de Lens in Lens, northern France. Philippe Huguen/AFP/Getty Images hide caption

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A Growth Factor Heals The Damage To A Preemie's Brain — In Mice

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Each year, 6 to 8 percent of the global population of sharks and rays gets caught, scientists say. The fish can't reproduce fast enough to keep pace Mike Johnston/Flickr hide caption

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Ancient And Vulnerable: 25 Percent Of Sharks And Rays Risk Extinction

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Ambassador Kennedy Criticizes Japan's Dolphin Hunt

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The round stingray is native to the eastern Pacific coast and is notorious for injuring swimmers and surfers. laszlo-photo/Flickr hide caption

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Mild-Mannered Stingrays Can Inflict A World Of Hurt

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National Zoo's Panda Cub Greets Her Fans

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Profiting From Rhinos, Far From Their Habitat

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A northern spotted owl in a Redwood forest. Michael Nichols/Getty Images/National Geographic Creative hide caption

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To Save Threatened Owl, Another Species Is Shot

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Robert Krulwich/NPR