The tallest and the heaviest world champion in Boxing history, the Russian giant, is trying to track down another giant, the “Yeti” in a remote part of Siberia. Nikolai Valuev is heading an expedition after reports of several sightings in recent years. According to a report, the former WBA heavy weight champ has gone east in a search of a very different beast, the Yeti. He is heading an expedition in deepest Siberia to track down the Russian Big Foot in the Mountains of Kemerovo region. There have been several sightings of a hairy humanoid, about six feet tall but big enough and mysterious enough to be dubbed the Siberian snowman.