Remnants of this land mass still exist in Russia, the US, Canada and Greenland, says groundbreaking new research.

Map of shame: Greenpeace highlights junk and debris in dozens of sites across the 'pristine' environment.

Permanent patrols commence led by the heavy nuclear-powered guided-missile cruiser Pyotr Velikiy.

Helicopter crash kills three including leader of expedition to find schooner lost in infamous 1914 tragedy.

Major bid to check radioactive waste dump area in Arctic archipelago.

Life returns to port of Tiksi with construction of a military town.

Shoreline on remote island retreats by 74 metres in seven years due to increased wave power of unfrozen sea, and thawing permafrost.

Up to 500 mother bears a year give birth on remote Wrangel island, also the last place to see woolly mammoths.

Only 7 dogs remain: is it enough to save the species?