Last-Ditch Resort: Move Polar Bears to Antarctica?

If the most dire climate predictions come to pass, the Arctic ice cap will melt entirely, and polar bears could face extinction. So why not pack a few off to Antarctica, where the sea ice will never run out? It may seem like a preposterous question. But polar bears are just the tip of the "assisted colonization" iceberg. Other possibilities: moving African big game to the American Great Plains, or airlifting endangered species from one mountaintop to another as climate zones shrink. "It's a...Full Story
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