No one really knows what happened to claim the lives of 9 incredibly experienced Soviet hikers back in 1959, but Bailey came prepared with theories and all the puzzling details for this episode.

Sources:

Has an Old Soviet Mystery at Last Been Solved? | The New Yorker

The Dyatlov Pass incident: How did nine Russian hikers lose their lives? | Sky HISTORY TV Channel

How do you pronounce kolmogorova in English?

Dyatlov Pass: Cameras