Photo: New, "Chubbier" River Dolphin Species Found in Bolivia



Bolivian river dolphins (above, in an undated photo) evolved separately from their relatives the Amazon river dolphins when an ancient drought split the two populations into two river systems, conservationists said in August 2008.

But the two species may meet once again if a Brazilian dam raises river levels—possibly spelling disaster for both species, experts say.

Photograph courtesy Fernando Trujillo, Fundación Omacha


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