The Mysteryphile Collective investigate one of the most perplexing and chilling mysteries of the 20th century. In February 1959, a group of nine experienced Russian mountaineers perished during a difficult expedition in the northern Urals. Several theories have been proposed to explain this incident, including infrasound-induced panic, UFOs and Aliens, attacks by Yetis or local tribesmen, katabatic winds, a snow avalanche, a romantic dispute, nuclear-weapons tests. What really happened in this unsolved mystery?

Music by phenomenal British composer Andy Garbi - The Sound of One.