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The vast, sparsely populated part of the world known as Siberia is, apparently, home to a new phenomenon: giant craters suddenly forming out of nowhere. At first thought to be few and isolated, new discoveries are raising an alarm as it now appears the craters may be far more common and widespread than initially imagined. A less-than-comforting theory has arisen to explain the phenomenon; warming permafrost causes methane to be released, resulting in crater-forming explosions. In an area with considerable oil extraction activities, such eruptions could prove costly and deadly. The Washington Post elaborates: http://www.washingtonpost.com/news/morning-mix/wp/2015/02/26/the-siberian-crater-problem-is-more-widespread-and-scarier-than-anyone-thought/

The Siberian Times has more expansive coverage: http://siberiantimes.com/science/casestudy/news/n0127-dozens-of-mysterious-new-craters-suspected-in-northern-russia/