The Lake Superior region of America is richer than ... showing that they employed heat in their mining operations—by heating the rock first, then cooling it quickly with water to soften it ...

The Western Preserve was split in two and the remains were found at a depth of about 600 feet in Lake Superior, experts said. Photo by the Great Lakes Shipwreck Historical Society In 1892 ...

ALGER COUNTY, MI --Not many job perks include sunrises over Lake Superior or Great Lake shipwrecks in your backyard − but this one does. The Pictured Rocks National Lakeshore is looking for ...