Thoth, God of Knowledge: Red clay erosion - sediment plume in Lake Superior - epa.gov
Thoth, God of Knowledge: Lake Michigan dunes with power plant in background - epa.gov
Thoth, God of Knowledge: Dredging, Duluth, Minnesota-epa.gov
Thoth, God of Knowledge: Dredge, Lake Michigan - Center for Great Lakes and Aquatic Sciences - epa.gov
Thoth, God of Knowledge: Calumet Park, Illinois - epa.gov
Thoth, God of Knowledge: Deformed, dead chicks, Unknown Location-Lake Michigan Federation-epa.gov
Thoth, God of Knowledge: Growth on long-nosed sucker, Unknown Location-Center for Great Lakes and Aquatic Sciences- epa.gov