When thinking of animals that reflect the breadth and diversity that is Edinburgh, there’s a plethora of species to choose from, from the mythical unicorn, which is the nation’s symbolic animal, to Greyfriars Bobby, a famed Skye terrier who is the city’s mascot. There is also Dolly the Sheep, the first mammal to be cloned, or Wojtek the Soldier Bear, who helped allied forces during World War II. Now, what would one make of a rhinoceros having anything to do with “Athens of the North”? During the 1960s, a young American named…