Gas bubbles from waters filling crater hole on Yamal peninsula two months after volcanic-style explosion in thawing permafrost.
Both Greenpeace and the World Wildlife Fund are expressing grave concern at the risk of contamination in the Pechora Sea.
The unusual swimmer stunned fishermen who said they never saw bears venturing so far out to sea.
Agafya Lykova, 73, lives in home her father built when he secretly fled Stalin's religious persecution, vanishing from world in 1936.
Carcass of dead animal with bird-like beak and fur on its tail poses new questions.
Scientist warns of 'environmental disaster' due to 'irreversible' pollution in world's deepest and oldest lake.
Likely from the Okunev culture, might this mysterious ancient figurine with the angry face be a children's 'rattle', to ward off evil spirits?
12,000-year-old remains of puppy were discovered perfectly intact sealed inside permafrost.
French team prepare to 'reanimate' a 30,000 year old 'giant virus'.
In each case the deadly decades-old 'zombie' disease originated in contaminated soil and was awakened by hot Arctic summer weather.