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For the First Time Since 1925, a Gray Wolf Crossed Into Iowa. It Didn't End Well.

Researchers say the gray wolfs rise in the United States has vindicated their essential ecological role, helping to promote young forest and biodiversity in Yellowstone National Park. But there have been struggles.
Researchers say the gray wolfs rise in the United States has vindicated their essential ecological role, helping to promote young forest and biodiversity in Yellowstone National Park. But there have been struggles.