As temperatures sunk to minus 50C and below, schools and kindergartens were closed for the world's hardiest children.
The successful bid was at one of Siberia's most popular winter sports resorts - Sheregesh.
Growing number of brave Siberians strip off for the winter, with debate raging about the benefits of taking to the snow and ice naked.
Summer flooding will worsen dramatically, and the Arctic could be ice-free in summer by 2034.
These extraordinary pictures give graphic new evidence of climate change.
Almost 3 million hectares on fire, including Arctic, with fumes having hit area larger than European Union.
Remains of extinct 'Steppe Mammoth' could bring new leap in understanding of 200,000 year old creatures.
Boris Fyodorov, 37, complains it was 'too warm', and now wants to try in minus 60C.