The Dyatlov Pass incident resulted in the deaths of nine ski hikers in the northern Ural Mountains on the night of February 2, 1959.
The lack of eyewitnesses has inspired much speculation. Soviet investigators determined only that “an unknown force” had caused the deaths. Their clothing, when tested, was found to be highly radioactive.
One of the peculiarities of the scene was that their tent had been torn open from the inside, the hikers fleeing out into the sub zero temperatures without even shoes.
Some of the bodies found had damage similar to that of a car accident, but only internally. Their skin on the outside was unharmed.
Other of the young hikers’ faces had aged, hair even grey. One girl’s tongue was missing.
Detailed information and photos:
http://www.ermaktravel.com/Europe/Russia/Cholat-%20Syachil/Kholat%20Syakhl.htm
This video stresses that it was caused by aliens. I don’t know about that. Either way, I find the mystery of their deaths compelling.
http://www.youtube.com/watch?feature=player_embedded&v=m5KmbuSrqEk
Keep checking this source blog. I’ve been updating it as I learn more.