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<http://www.treehugger.com/slideshows/natural-sciences/week-in-animal-news-return-wooly-mammoth-ziplining-bull-dog/page/2/www.treehugger.com/science/>
<http://www.treehugger.com/slideshows/natural-sciences/week-in-animal-news-return-wooly-mammoth-ziplining-bull-dog/page/2/>