Mysteries of the Great Lakes

⭐ Featured Review

"One viewer complained that this film has a tiny bit about the Great Lakes and a whole lot about restoring the sturgeon population. In actuality, the film provides an informative outline of the geological story of the formation and evolution of the Great Lakes, including how the overall flow of water actually reversed as the ancient ice masses receded. The graphics showing all this are impressive and fascinating. There is also much material about how human populations depend on the Lakes and how we first damaged them and now are learning to use them responsibly. Historic exploitation and near-e..."