Yevgeny Tikhonov, 26, was climbing a student dormitory building in subzero temperatures; probe underway to discover how he died.
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.
A life in the day of one of Siberia's industrial giants.
Video shows hero climbers manually breaking ice off its cable stays at height of 324m (1,063ft) in Vladivostok.