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Emperor Penguins
Photo: Emperor penguins near iceberg, Antarctica
Sheltered by a titanic iceberg, emperor penguins bask in the Antarctic sun. Emperor penguins survive this harsh environment, where wind chills can reach -75 degrees Fahrenheit (-60 degrees Celsius), by huddling together in large groups to block wind and conserve warmth.
Photograph by Ted Mead/Getty Images

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