Bottlenose dolphins spotted killing dolphin juvenile / Scottish university creates identification tool to recognise dolphins' accents / AI tool will be able to trace dolphins by their regional accent / Tool developed to track dolphins by their 'regional accent' / Dolphins 'smile' during play, scientists find / Wild and human-cared spotted dolphins harbor different gastrointestinal microbiomes, researchers find / Do Dolphins Give Each Other... Names? / Dolphins in Ukraine also aware of war-torn surroundings / Boat crew 'thrilled' by playful dolphins / Discovering the world of dolphins and their three 'super senses'