Ever caught a whiff of a familiar perfume and been reminded of a friend? Dolphins do much the same thing, by tasting each other's urine
at Stephen F. Austin State University in Texas and his colleagues found that bottlenose dolphins spent about three times longer sampling water that contained urine collected from familiar dolphins compared with unfamiliar ones, suggesting they recognised their friends’ unique urine tastes.
This suggests they have concepts of individual friends in their minds that connect their unique taste and sound, says Bruck. This is similar to how we have mental representations of our friends that integrate multiple elements like the“While that might sound easy to do for a human, animals don’t always do that,” says Bruck.
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