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Another consequence of global warming: Polar bear attacks

What happens when polar bears in a warming Arctic start losing their natural source of food? Increasingly, the starving bears are leaving their (melting) ice floes and making their way onto land in search of something to eat -- leading to dangerous encounters with humans.

In the northern reaches of Canada and the Russian Far East, polar bear attacks are becoming a serious threat. Three people in Kamchatka were killed by bears this year; last week, two people in Churchill were brutally mauled while walking home from a Halloween party. And a pack of 43 polar bears lie in wait nearby the village of Ryrkaypy in Chukotka, where local residents have been warned not to go outside after dark.

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