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September 12, 2011

Invasion of the Earthworms!


Native earthworms in the Great Lakes region were all wiped out after the last Ice Age. The current population was brought by Europeans hundreds of years ago, (soil was often used as ballast in ships) and they're now changing the face of local forests. Anglers are adding to the problem by dumping worms that don't end up on the end of a hook.

Credit: National Science Foundation


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