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Mystery blooms on Walden Pond

Scientists puzzled over tiny freshwater jellyfish

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By Beth Daley
Globe Staff / September 10, 2010

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Gwen Acton thought the dime-sized translucent pods she saw on her Sunday swim in Walden Pond were strange, beautiful seeds that had drifted down to the water surface from some flowering plant. (Full article: 1010 words)

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