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'''Sources''' | '''Sources''' | ||
* A German TV [ | * A German TV [https://www.n-tv.de/913309.html news report] | ||
* [http://www.youtube.com/watch?v=4OqlTXwLG40 A video] from The Discovery Channel | * [http://www.youtube.com/watch?v=4OqlTXwLG40 A video] from The Discovery Channel | ||