“Muskox,” Dovrefjell-Sunndalsfjella National Park, Oppland, Norway, by Matthew Polvorosa Kline, Lagunitas, California, USA. This image was the winner in the Polar Passion category.

Kline says: “I had the unforgettable opportunity to photograph wild muskoxen. These wondrous mammals are living relics from a prehistoric age. I located a group on top of a mountain and sat in the bitter cold as a snowstorm arrived. One muskox confidently came near me and lay down to rest, while this bull – with his prominent horns and frosted wool – kept a watchful eye as he drifted slowly among the rocks.”

‘Walrus Poolepynten,’ posted earlier: