MLive - GrandRapids/Muskegon/Kalamazoo on MSN2d
‘Nobody checks ice thickness:’ Pictured Rocks warns against walking to Grand Island
Pictured Rocks National Lakeshore has been fielding question about current ice thickness and future ice forecasts for the ...
Scientific American3y
Ancient Mines on Lake Superior
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 ...