Behind Minnehaha's Frozen Falls

image credit: akahodag cc
Minnehaha Creek in Minnesota would be just another creek, if it was not for the beautiful fifty foot waterfall that just happened to form there when the last glacial period ended about 10,000 years ago. In the winter the falls can freeze up completely, creating a magical motionless image of once liquid water frustrated by the elements. Yet there is more to it than meets the eye...