Yan - 'the only friend in my life' - was stolen in February, prompting extraordinary search by Vladimir Davydov, 77.
As the world prepares to herald in the arrival of 2015, we look back at the winter celebrations of the Soviet yesteryear.
Our map shows the attacks by bears on humans across a swathe of Siberia and the Russian Far East.
US, Dutch, Swiss, Swedish, South Korean, German and Russian tourists banned from leaving the area.