Photo Gallery: The Return of the Invisible Fish Thief
Foto: Andreas Kranz
Fotostrecke

Photo Gallery: The Return of the Invisible Fish Thief

Back From the Brink Biologists Puzzle Over the Return of the Otter

European otters are a mystery to scientists: For decades they were thought to be verging on extinction but now their populations are swelling -- without any help from humans. The swimming predators feel at home in the Alps, where people have mixed feeling about their return.
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