In the Great Lakes, NOAA monitors lake, weather and climate conditions, conducts scientific research and safeguards ...
"Sinkholes are most common in what geologists call, 'karst terrain'," the US Geological Survey explains. "These are regions ...
NBC 26 WGBA Green Bay, WI on MSN14d
It's not aliens! But the Lake Michigan sinkhole mystery is far from solvedNone ...
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