Located close to border region pivotal in war with Japan, experts say the pass was used to exchange intelligence.
The number of Amur leopards in the wild in the Far East of Russia has dramatically increased, say wildlife experts.
Her dog saved her by caring for Karina for nine days then returning home and guiding rescuers to her.
South Korean specialist hails opening of new World Mammoth Centre in Siberia, dedicated to bringing beast back to life.