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Pictures | Tue Dec 8, 2009 | 9:25am EST

Polar bear turns cannibal

<p>A male polar bear carries the head of a polar bear cub it killed and cannibalized in an area about 300 km (186 miles) north of the Canadian town of Churchill November 20, 2009. Climate change has turned some polar bears into cannibals as global warming melts their Arctic ice hunting grounds, reducing the polar bear population, according to a U.S.-led global scientific study on the impacts of climate change.  REUTERS/Iain D. Williams </p>

A male polar bear carries the head of a polar bear cub it killed and cannibalized in an area about 300 km (186 miles) north of the Canadian town of Churchill November 20, 2009. Climate change has turned some polar bears into cannibals as global...more

A male polar bear carries the head of a polar bear cub it killed and cannibalized in an area about 300 km (186 miles) north of the Canadian town of Churchill November 20, 2009. Climate change has turned some polar bears into cannibals as global warming melts their Arctic ice hunting grounds, reducing the polar bear population, according to a U.S.-led global scientific study on the impacts of climate change. REUTERS/Iain D. Williams

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<p>A male polar bear cannabalizes a polar bear cub in an area about 300km (186 miles) north of the Canadian town of Churchill November 20, 2009.  REUTERS/Iain D. Williams </p>

A male polar bear cannabalizes a polar bear cub in an area about 300km (186 miles) north of the Canadian town of Churchill November 20, 2009. REUTERS/Iain D. Williams

A male polar bear cannabalizes a polar bear cub in an area about 300km (186 miles) north of the Canadian town of Churchill November 20, 2009. REUTERS/Iain D. Williams

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<p>A male polar bear carries the head of a polar bear cub it killed and cannibalized in an area about 300 km (186 miles) north of the Canadian town of Churchill November 20, 2009.  REUTERS/Iain D. Williams </p>

A male polar bear carries the head of a polar bear cub it killed and cannibalized in an area about 300 km (186 miles) north of the Canadian town of Churchill November 20, 2009. REUTERS/Iain D. Williams

A male polar bear carries the head of a polar bear cub it killed and cannibalized in an area about 300 km (186 miles) north of the Canadian town of Churchill November 20, 2009. REUTERS/Iain D. Williams

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<p>A male polar bear drags the remains of a polar bear cub it killed and cannibalized in an area about 300km (186 miles) north of the Canadian town of Churchill November 20, 2009. REUTERS/Iain D. Williams </p>

A male polar bear drags the remains of a polar bear cub it killed and cannibalized in an area about 300km (186 miles) north of the Canadian town of Churchill November 20, 2009. REUTERS/Iain D. Williams

A male polar bear drags the remains of a polar bear cub it killed and cannibalized in an area about 300km (186 miles) north of the Canadian town of Churchill November 20, 2009. REUTERS/Iain D. Williams

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<p>A male polar bear carries the head of a polar bear cub it killed and cannibalized in an area about 300 km (186 miles) north of the Canadian town of Churchill November 20, 2009. REUTERS/Iain D. Williams </p>

A male polar bear carries the head of a polar bear cub it killed and cannibalized in an area about 300 km (186 miles) north of the Canadian town of Churchill November 20, 2009. REUTERS/Iain D. Williams

A male polar bear carries the head of a polar bear cub it killed and cannibalized in an area about 300 km (186 miles) north of the Canadian town of Churchill November 20, 2009. REUTERS/Iain D. Williams

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<p>A male polar bear waits for an ice sheet to form to allow migration in an area about 300km (186 miles) north of the Canadian town of Churchill November 17, 2009. REUTERS/Iain D. Williams </p>

A male polar bear waits for an ice sheet to form to allow migration in an area about 300km (186 miles) north of the Canadian town of Churchill November 17, 2009. REUTERS/Iain D. Williams

A male polar bear waits for an ice sheet to form to allow migration in an area about 300km (186 miles) north of the Canadian town of Churchill November 17, 2009. REUTERS/Iain D. Williams

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<p>The remains of a polar bear cub stain the snow after it was killed and cannibalized by a male polar bear in an area about 300km (186 miles) north of the Canadian town of Churchill November 20, 2009. REUTERS/Iain D. Williams </p>

The remains of a polar bear cub stain the snow after it was killed and cannibalized by a male polar bear in an area about 300km (186 miles) north of the Canadian town of Churchill November 20, 2009. REUTERS/Iain D. Williams

The remains of a polar bear cub stain the snow after it was killed and cannibalized by a male polar bear in an area about 300km (186 miles) north of the Canadian town of Churchill November 20, 2009. REUTERS/Iain D. Williams

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