Polar bear Knut yawns in his enclosure in the zoo in Berlin on Tuesday, April 8, 2008. As interest in the Berlin zoo's now fully-grown polar bear sensation, Knut, seems to be waning Nuremberg city and zoo officials have introduced Flocke, Germany's latest polar bear cub, to a public eager for its first live glimpse of her after months of having their heartstrings tugged with photos and video of the furry imp. (AP Photo/Miguel Villagran)

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