Spring storm brings rain and wind Tuesday into Wednesday

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Create a More Connected Minnesota

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The sea lamprey was one of the first non-native species to invade the Great Lakes, and it's been one of the most destructive. The eel-like parasite nearly wiped out the entire lake trout population. But scientists have devised ways to keep the blood-sucking fish in check, and that's allowed lake trout to make a historic comeback.

Photos: Fighting sea lamprey in Lake Superior

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