The Dyatlov Pass incident is one of the great unsolved ... and involved a highly unusual type of avalanche. Specifically, the nine students set up camp in an area that they thought was safe ...

The mountain pass was named after Dyatlov, the head of the expedition ... Various versions of the incident were considered, including an avalanche hitting their tent, an attack by fugitive ...

The book entitled "The Dyatlov Pass" contains more than 500 pages ... Various versions of the incident were examined, including an avalanche hitting the tent, an attack by fugitive prisoners ...