Timon (12) and Max (9) play with an animal view helmet by artists Denis Connolly and Anne Cleary at the announcement of plans for Biotopia, the  natural history museum  at Nymphenburg Palace, Munich. Photograph: Robert Gongoll

On a crisp night in January, Munich’s Nymphenburg Palace looks like the home of the mythical Snow Queen. Ducks and geese jostle happily on the frozen(...)