The Mystery of the Dyatlov Pass Incident

The Dyatlov Pass Incident occurred in the Ural Mountains of Russia in 1959.

The hikers were found inside their tent, having died from extreme cold.

One of the most bizarre discoveries was that some of the hikers had high levels of radiation on their clothing.

The official cause of death given in Soviet reports was an "avalanche."

One theory suggests that infrasound, caused by wind patterns, induced panic among the hikers.