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Adelie penguins: cool, efficient killing machines


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An Adelie penguin carrying a video camera on its back stands in Langhovde, Antarctica January 7, 2012, in this handout photo released by Japan's National Institute of Polar Research's Assistant Professor Yuuki Watanabe on January 23, 2013. REUTERS/Yuuki Watanabe/National Institute of Polar Research/Handout