Yevgeny Tikhonov, 26, was climbing a student dormitory building in subzero temperatures; probe underway to discover how he died.
The tragedy was at an industrial waste plant near the oil rich Siberian city of Khanty-Mansiysk.
Vet clinics inundated with cases of cats and dogs suffering health problems and rashes in 'Dirty 30' Siberian city.
Yet nickel capital Norilsk - the city with the highest industrial emissions - does not feature in the top ten.
Oil slicks, sewage, industrial waste and rubbish floating sea is harming wildlife and could lead to marine crisis.
Kids learn how to tell apart a dog and wolf footprint, to make a LED torch, how a hydraulic unit works, and who a bear wakes first.
Bone-cracking cold, Gulag prison camps, oil flares visible from space, and bleak industrial cities - this is a common Western stereotype of Siberia.
Vostochny Cosmodrome will 'improve life in the Far East and upgrade its industrial base'.
The bear 'had wrong compass settings’ and came south, the first polar bear seen in city since 1970s.