Posts Tagged ‘Churchill’

Polar bear numbers in Canada “likely the highest there has ever been”

April 6, 2012

Polar bears near Churchill, Manitoba: Ward Kennan photolibrary

DNA studies have shown that polar bears and brown bears have a common ancestry. The genetic split occurred about 150,000 years ago in the late Pleistocene just before the end of the Pleistocene glaciation known as the Ice Age. They evolved to meet the conditions of the Ice Age and they continue to adapt. In their present form as polar bears they have survived previous interglacials with temperatures greater than we have at present. And far from being endangered and under threat of extinction they continue to adapt their behaviour and to prosper.

New surveys have shown that 

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