EDITOR’S NOTE: No polar bears were harmed in the making of this PSA. DISCOVER: In May the U.S. Department of the Interior classified polar bears as threatened under the Endangered Species Act. Documented declines in sea ice and anticipation of massive melting that threatens the bears’ habitat prompted the action. MORE RELATED: Unless the pace of global warming slows or stops, polar bears could disappear within a century, says a University of Alberta expert in Arctic ecosystems. While it has been known for some time that the polar bear is in trouble, new research shows that Arctic ice – the […]