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Russian scientists find 7,000 Siberian hills possibly filled with explosive gas

By Ben Guarino, The Washington Post March 27, 2017
1117

Russian scientists recently discovered 7,000 earthen knobs erupting from the Siberian Arctic, each the size of a small hill. It was as though the permafrost had broken out into giant grass-covered mounds. What’s more, an unknown number of these bubbles could contain methane and explode, forming craters, the Siberian Times reported.

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