Summary: Gabriel Melo-Santos studies Araguaian river dolphins in Brazil, and his work has revealed that the species is much chattier than we’d previously known, and could potentially help us better understand the evolution of underwater communication in marine mammals. He plays some of the fascinating recordings he’s made of their 'speech' plus we round up the top environmental news, so if you like what you hear, please leave a review, subscribe, and tell a friend.
