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A baby chimp at the Naturalis museum in Leiden. “Usually the collection manager lets me in and then picks me up at the end of the day," Van Ark says. "It always smells badly of chemicals to keep the moths away, but every place is different — some are super organized, some are a big mess. Sometimes you have a shitty museum and a beautiful storage room. In Leiden, they had a whole herd of zebras.”