War in Ukraine: Russia trains dolphins to patrol Crimean port of Sevastopol

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According to the American Naval Institute, satellite images show that Russia appears to have doubled the size of dolphin pens inside the Crimean port of Sevastopol. The cetaceans are there to patrol the area in order to detect potential Ukrainian combat swimmers. In this Science segment, we tell you more about the surprising use of animals on the battlefield, from pigeons to cats and eagles.