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What do you get if you cross a polar bear and a grizzly?
Yes, polar and grizzly bears can breed, and their offspring are called pizzly or grolar bears. But what does science have to say about these odd hybrids? Are they the future of adaptation in a changing climate or could they accelerate the demise of the polar bear?Guest: Andrew Derocher, Professor of Biological Sciences at University of Alberta in Edmonton Canada, and author of ‘Polar Bears: A complete guide to their biology and behaviour’.
The skinny
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