However, in over a third of cases (33.16%), these dolphin smiles triggered a similar open mouth response from the receiver. In the other 66.84% of cases, the receiver did not smile back and the ...

The dolphin smile is a fixed feature of their anatomy—dolphins smile even when dead. Dolphins and other cetaceans suffer stress and anxiety when kept in captivity, particularly when there is no ...

If one dolphin does an OM, there’s a good chance ... kind of like how humans might smile at each other while having fun. The ...