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An unusual crater has been discovered on the Yamal peninsula in Siberia.
http://news.yahoo.com/blogs/the-sid...ed-in-remote-region-of-siberia-003800386.html
http://www.universetoday.com/113287/what-created-this-huge-crater-in-siberia/
http://en.wikipedia.org/wiki/Pingo
http://news.yahoo.com/blogs/the-sid...ed-in-remote-region-of-siberia-003800386.html
http://www.universetoday.com/113287/what-created-this-huge-crater-in-siberia/
http://en.wikipedia.org/wiki/Pingo