More craters expected to form due to such eruptions as permafrost melts - and they ARE caused by global warming releasing methane gas.
Scientists say a 'fountain of gas' poured from jelly-like trembling earth in tundra on Belyy Island in northern Siberia.
Earth is moving as 'leaking methane gas due to global warming causes surface to bubble' in a new phenomenon.
200 metres wide thermocirque seen weeks after scientists find funnel in the Yamal peninsula, caused by build up of methane.
Startling new details emerge of the most mysterious of Siberia's newly created giant permafrost holes.
Local reindeer herder witnessed the tundra explosion that led to birth of new hole in river.
Satellites show giant hole ringed by 20 'baby craters'.