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