Rolf J. Petersen, born into eternal life with family and friends at his side on March 28 at the age of 60; beloved husband of Diane; loving father of Dana (Peter) Clark, Chelsea and Hillary; dear ...

ISLE ROYALE, Mich. – A lone wolf was spotted on Isle Royale, and a Michigan Technological University research group snagged a few photos. Professor Rolf Peterson said the research group has a small ...

For half a century, Rolf Peterson has visited a remote island in Lake Superior where the snow comes up to his hip and the cold wind is fierce enough to split a tree trunk. During the trips, he studies ...

This photo taken Jan. 24, 2023, shows a pack of wolves after they killed a moose at Michigan’s Isle Royale National Park. (AP Photo/Rolf Peterson, Michigan Technological University) TRAVERSE CITY, ...