Due to environmental conditions, competition for resources and fishing, the typical life span for a lake trout in Lake Superior is 25 to 30 years. Prior to this discovery, the oldest known lake trout ...

ISLE ROYALE (AP) — Researchers from Michigan Tech University were unable to conduct their annual wolf-moose survey on Isle Royale this past winter. A last-minute medical issue grounded their ski ...

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 ...

Isle Royale-Wolf Survey (AP / Jacob W. Frank) - FILE - This Sept. 26, 2018 file photo provided by the National Park Service shows NPS staff unloading a crated gray wolf from a United States Fish ...

A medical issue grounded Isle Royale's wolf-moose survey this winter, delaying annual population estimates.

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 ...

Researchers from Michigan Tech University were unable to conduct their annual wolf-moose survey on Isle Royale this past winter. A last-minute medical issue grounded their ski-plane pilot, and no ...

Researchers from Michigan Tech University were unable to conduct their annual wolf-moose survey on Isle Royale this past winter.