1. Polar Bears Resort to Cannibalism as Arctic Ice Shrinks
... them from obtaining food from their natural sources. Normally, polar bears feed primarily on ringed seals and use sea ice for basic functions like feeding, mating and giving birth. American and Canadian scientists reviewed three examples of polar bears preying on each other from January to April 2004, in northern ... and 34 years in northwestern Canada, we have not seen other incidents of polar bears stalking, killing and eating other polar bears." Environmentalists believe that the shrinking of the polar ice (due to global warming) may lead to the extinction of polar bears before the ...
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