Bulging bumps in the Yamal and Gydan peninsulas believed to be caused by thawing permafrost releasing methane.
After 1,907 kilometre odyssey, crossbreed is back home to his day job keeping polar bears at bay in remote weather station.
Earth is moving as 'leaking methane gas due to global warming causes surface to bubble' in a new phenomenon.
New shipping link symbolises developing Arctic economy which can avoid eco-damage, says Putin.
Helicopter crash kills three including leader of expedition to find schooner lost in infamous 1914 tragedy.
Pipes are built over bulging and unstable Arctic pingos prone to violent eruptions caused by 'thawing methane gas', as seen twice on the Yamal peninsula this year.
Challenge to polar doom warning from respected international expert Professor Peter Wadhams of Cambridge University.