Freshwater [mussels](http://www.answers.com/topic/mussel “Answers.com Mussels Article”) may start disappearing from dinner plates as species increasingly become extinct or endangered by human activities, scientists say. North America has historically had a very diverse community of freshwater mussels, but populations have been on the decline for the past few decades. Mussels now are one of the most endangered groups of animals on the continent

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