It's a global buzzword and cultural phenomenon. When the cold and darkness of winter close in, more and more of us go in search of Denmark's signature recipe for happiness: 'hygge'.Danish 'hygge' (pronounced 'HOOG-uh') is sweeping the world – everyone wants in on Denmark's famously convivial way of life. The Danish are the happiest people on the planet – even during the long, dark days of winter - and it's all about hygge.So much so, hygge has actually been nominated for UNESCO...