Superior island that has dwindled to just two and is in danger of vanishing altogether.If the Park Service — which for more than a year has been looking at the fading Isle Royale wolf population and a moose herd that has swelled to 1,300 with its main predator in decline — follows through, it could quickly revive a closed ecosystem on the rugged 45-mile-long island protected from hunting and existing largely outside of human interference.

Source: Isle Royale may add 20-30 wolves to keep pack from disappearing