This is Scientific American's 60-second Science, I'm Jason Goldman.Got a minute?Rhinos have notoriously poor eyesight, so they mostly rely on their noses to understand the world around them.But there's one interaction in which sound plays a key role.Southern white rhino males can either be dominant or subordinate. And only the dominant males hold and defend territories.New research finds that they eavesdrop on the calls of other males to know who is who."We found that contact calls carry information about the dominance status of the males.It means that only by listening to the calls, you can say if the male is territorial or subordinate."Ivana Cinková, a zoologist at the University of KwaZulu-Natal in South Africa.She and her team spent almost two years in South Africa's Hluhluwe-iMfolozi Park recording the social contact and courtship calls of male rhinos.Then they played those calls back to dominant territorial males and watched the responses.The researchers asked that the rhino calls not be included in this podcast due to the concern that poachers might use the calls to lure rhinos closer.Back to the reactions of the rhinos:"They started to search for the intruder the most quickly
