The dozens of sunken ships around Michigan's Thunder Bay might be threatened by a tiny menace: invasive mussels.
via LiveScience.com http://www.livescience.com/27415-shipwreck-alley-threatened-by-invasive-mussels.html
via LiveScience.com http://www.livescience.com/27415-shipwreck-alley-threatened-by-invasive-mussels.html
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