Zac Unger

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  • A polar bear rests with her cubs on pack ice in northern Alaska. A federal judge in 2011 said the Bush administration violated the National Environmental Policy Act by failing to conduct an environmental impact review before issuing its ruling on the status of polar bears under the Endangered Species Act. (Associated Press)

    Book: Polar bear population on the rise

    Global hysteria ensued after former Vice President Al Gore posed a theory in his film, "An Inconvenient Truth," that polar bears were on the edge of extinction. Soon after, reports of fish shortages, cross-breeding between species and even polar bear cannibalism added to the global-warming debate.


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