The freeze is so deep that horses - and even Rudolph - is brought indoors to warm up.
Human eye surgeon takes part in operation to give cub the chance to go back to its natural habitat.
The rare Amur tigress was saved from starvation more than a year ago after she was orphaned when poachers killed her mother.
Pictures of the paws, stashed in the tyres of their vehicle, have gone around the world.
Pioneering life-saving operation to be carried out this week, as bid made to find and shame the gunman.
First pictures of remains at least 10,000 years old found in Siberia's Sakha Republic.
Exclusive pictures show autopsy on a four year old bison preserved in ice since ancient times.
Traps record snow leopardess and cubs as experts work with border guards to help protect species.
Cub was shot in the legs but there are fears the mother was also slain by poachers.
With as few as 70 left in the wild, evidence of poachers targeting species is likely to be a concern.