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  • Araguaian river dolphin swimming in the Araguaia River in Brazil. Researchers from the University of Vermont and University of St. Andrews discovered that the dolphin species, which was thought to be solitary and quiet, can actually make hundreds of different sounds, a finding that could help uncover how communication evolved in marine mammals.
    Paulo Castro
    Araguaian river dolphin swimming in the Araguaia River in Brazil. Researchers from the University of Vermont and University of St. Andrews discovered that the dolphin species, which was thought to be solitary and quiet, can actually make hundreds of different sounds, a finding that could help uncover how communication evolved in marine mammals.
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