Findings pave the way for a 1.2 million square kilometre claim to the UN on hydrocarbon drilling rights.
Fallen oil executive who dreams of political power named by investigators as 'new evidence' comes to light.
On a visit to the Far East, he strongly hinted they should give up summer holidays to complete unfinished tasks.
New geological evidence shows polar 'submarine elevations' as 'natural components' of Siberian continental land mass.
Threat to Salekhard and Anadyr could come even sooner - by the mid-2020s - as thaw of frozen ground is forecast to have 'devastating' impact.
200 metres wide thermocirque seen weeks after scientists find funnel in the Yamal peninsula, caused by build up of methane.
Bulging bumps in the Yamal and Gydan peninsulas believed to be caused by thawing permafrost releasing methane.
Greenpeace claims up to 300 times more territory in Siberia is ablaze than officially acknowledged.