r/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

Sinkholes discovered in the Yamal Peninsula in Siberia, Russia beginning in July 2014 are believed by Russian researchers to have been caused by methane released due to permafrost thawing.

from Pocket https://ift.tt/3luIrqS