Giant new 50-metre deep 'crater' opens up in Arctic tundra, believed to be caused by the build up of methane gas in pockets of thawing permafrost under the surface

Giant new 50-metre deep 'crater' opens up in Arctic tundra, believed to be caused by the build up of methane gas in pockets of thawing permafrost under the surface
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August 30, 2020 at 01:23AM