A last-minute medical issue grounded researchers’ annual wolf-moose survey on Isle Royale this past winter, marking yet another year that scientists have run into problems trying to count the animals on the remote island park. Isle Royale is a 134,000-acre island in far western Lake Superior between Grand Marais, Minnesota, and Thunder Bay, Canada. The island, which doubles as a national park, offers scientists a rare chance to observe wolves and moose in their natural habitat, free from human influence. Researchers have conducted an annual survey of the island’s wolf and moose ...