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Ponds, lakes, rivers and streams cover only a tiny fraction of Earth's surface, yet they are home to a comparatively large number of different species, according to a study led by University of Arizona ecologists. While much research has focused on the striking differences in biodiversity between tropical and temperate regions, another, equally dramatic, pattern has gone largely unstudied: the ...

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  • Environment and natural world 70.51%
  • Science and technology 29.49%

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