Photos of the Week: Siberian Tiger, Frosty Foliage, Snowball Fight

A snow-and-ice festival in northern China, destructive wildfires in Los Angeles, Ethiopian Orthodox Christmas celebrations in Addis Ababa, an oil spill off the cost of Crimea, and much more

A snow-and-ice festival in northern China, destructive wildfires in Los Angeles, Ethiopian Orthodox Christmas celebrations in Addis Ababa, the Dakar Rally in Saudi Arabia, a Christmas-tree snack at a Berlin zoo, an oil spill off the cost of Crimea, and much more

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