The Dyatlov Pass incident resulted in the deaths of nine ski hikers in the northern Ural mountains on the night of February 2, 1959. It happened on the east shoulder of the mountain Kholat Syakhl. The mountain pass where the incident occurred has since been named Dyatlov Pass after the group's leader, Igor Dyatlov. Investigators at the time determined that the hikers tore open their tent from within, departing barefoot into heavy snow and a temperature of −30 °C (−22 °F). Although the corpses showed no signs of struggle, two victims had fractured skulls, two had broken ribs, and one was missing her tongue and there was radiation present as the bodies were aged very quickly.
Personally, this is an extremely interesting case and requires further investigation.
I found a documentary developed by the local Russian Television Agency of Ural that is over 2 hours in length and can be subtitled using the browser. This goes into greater detail then the history channel piece and expands the mystery on the subject. Well worth the watch.
Part one of this can be found here: http://www.youtube.com/watch?v=-60PSLPMtWM
As always do your own research and we look forward to reading your comments on the matter.
Clip source: Ancient aliens - history channel.