By Sam Peters, CNN (CNN) — Pictures of a napping polar bear, the remnants of a rain shower in the Namib desert and a bustling dumpling stall in Seoul are among this year’s winners of the National Geographic Traveller (UK) Photography Competition, capturing both extraordinary moments and daily life around the world. Returning for its 15th year, the competition was divided into eight categories – Urban, People, Landscape, Wildlife, Food, Portfolio…