It s a headline we all have seen: Global warming is melting the Arctic. Once the Arctic sea ice has vanished, the majestic polar bear, a magnificent creature who needs the sea ice to survive will vanish, too. The ice is home to the bears, as well as to their primary food source, the ringed seal. Polar bears feed, mate, travel, den, and give birth on the ice. Some scientists say polar bears will be extinct within fifty years if something isn t done, and soon.