Startling new details emerge of the most mysterious of Siberia's newly created giant permafrost holes.
Haunting beauty of massive hole as scientists examine frozen lake formed after giant blowout.
200 metres wide thermocirque seen weeks after scientists find funnel in the Yamal peninsula, caused by build up of methane.
Giant sinkhole threatens more homes as it widens each week.
Earth is moving as 'leaking methane gas due to global warming causes surface to bubble' in a new phenomenon.
Local reindeer herder witnessed the tundra explosion that led to birth of new hole in river.
Men reunited with their families after successful operation to free them after fears of gas leaks and more rock falls.
When Vadim Kolpakov went on an expedition to the north of Irkutsk region, he had no inkling of the sensational discovery he was about to make.
Scientists rush to site of latest tundra eruption - which formed a crater 50 metres deep - amid fears for homes and key industrial sites.