http://www.dailymail.co.uk/sciencetech/article-2708345/Mystery-Siberian-crater-deepens-Scientists-left-baffled-two-NEW-holes-appear-Russias-icy-wilderness.html
Methane explosion? Meteorite crater? Scientists baffled by gigantic 262ft hole that has appeared at Siberia's 'End of The World'
http://conscience-du-peuple.blogspot.ca/2014/07/methane-explosion-meteorite-crater.html
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