Home worldnews 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 8/29/2020 06:52:00 PM A+ A- Print Email https://ift.tt/2G0CCB5 via /r/worldnews https://ift.tt/3gFBdNc worldnews Tweet Share Share Share Share Share
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