For more than three decades, scientists have been warning that climate change could drive polar bear populations extinct. Polar bears, a mascot for the impacts of climate change, are threatened by melting sea ice. The study, an analysis of hundreds of polar bears in the Norwegian archipelago of Svalbard, found that declining sea ice is not causing polar bears to starve. Without that ice, polar bears have a hard time finding and catching them. Although polar bears can’t easily kill a walrus, they can scavenge their tusked, fat-filled carcass when walruses die from other causes.