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Pictures | Thu Jan 24, 2013 | 12:33am EST

Adelie penguins: cool, efficient killing machines

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

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....more

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
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An Adelie penguin preys on a fish in this image taken from a video recorded by a video camera on a penguin's back in Antarctica January 14, 2011 and released by Japan's National Institute of Polar Research Assistant Professor Yuuki Watanabe on January 23, 2013. REUTERS/Yuuki Watanabe/National Institute of Polar Research/Handout

An Adelie penguin preys on a fish in this image taken from a video recorded by a video camera on a penguin's back in Antarctica January 14, 2011 and released by Japan's National Institute of Polar Research Assistant Professor Yuuki Watanabe on...more

An Adelie penguin preys on a fish in this image taken from a video recorded by a video camera on a penguin's back in Antarctica January 14, 2011 and released by Japan's National Institute of Polar Research Assistant Professor Yuuki Watanabe on January 23, 2013. REUTERS/Yuuki Watanabe/National Institute of Polar Research/Handout
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The head of an Adelie penguin and an ice floe are seen in this image taken from a video recorded by a video camera on a penguin's back in Antarctica December 30, 2010 and released by Japan's National Institute of Polar Research Assistant Professor Yuuki Watanabe on January 23, 2013. REUTERS/Yuuki Watanabe/National Institute of Polar Research/Handout

The head of an Adelie penguin and an ice floe are seen in this image taken from a video recorded by a video camera on a penguin's back in Antarctica December 30, 2010 and released by Japan's National Institute of Polar Research Assistant Professor...more

The head of an Adelie penguin and an ice floe are seen in this image taken from a video recorded by a video camera on a penguin's back in Antarctica December 30, 2010 and released by Japan's National Institute of Polar Research Assistant Professor Yuuki Watanabe on January 23, 2013. REUTERS/Yuuki Watanabe/National Institute of Polar Research/Handout
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