Dolphins’ "Smile" Reveals Playful Intentions - Neuroscience News

Dolphins’ "Smile" Reveals Playful Intentions  Neuroscience NewsDolphins’ open-mouth behaviors during play are like smiles, a study claims  Science News MagazineDolphin 'smiles' may truly be a sign of playfulness  New ScientistBottlenose dolphins 'smile' at each other while playing, research shows  Phys.orgWe’re Not Imagining It, Dolphins Really Do Smile When Playing With Friends  IFLScience