Yoga may have taken over the world, but the word still tends to conjure up images of people in warmer climes striking zen-like poses against tropical backdrops. But it doesn't have to be this way, as the Scandinavian-born practice of 'snowga' proves. With snowga (yoga in the snow), the concept of 'union' (the original meaning of 'yoga') is taken one step further, with the harmony between mind and body joined by an extra connection with nature.