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often referred to as the Datlov Pass incident. The incident details the mysterious deaths of nine hikers as they attempted a challenging trek through the Ural Mountains in Russia. The hikers, eight students of the Ural Polytechnic Institute in what was once known as Serdlovsk in Russia, and their friend Sascha Koliatov, had been making their way towards O'tauton Mountain on February the first, nineteen fifty nine, when they made camp on
a mountain called Kolatsiak. That night, the hikers, for some inexplicable reason, were seemingly compelled from the sanctuary of their tent and driven to their deaths in the snow and subzero temperatures outside. There have been numerous attempts over the years to unravel the mystery, with theories involving everything from secret weapons testing, UFOs, the wrath of ancient gods, to the possible involvement of Mansie tribesmen or KGB, as well
as natural disasters such as high winds and avalanches. But what seems key to any theory were the two startling revelations discovered by investigators at the time. One was that none of the group had been found with shoes and in many cases were woefully underdressed, and the other that they appeared to have cut their way out of their
own tent. The revelations would suggest that most likely something unseen had induced a heightened level of fear in the group, causing them to take immediate and evasive action, and possibly
under the influence of sheer blind panic. It is of course possible that only one or two of the members had reacted in such a way, leaving the others no choice but to attempt a rescue, and in some ways it seems unlikely that every member would panic in the same way, and yet not one of them had taken the time to even put on their shoes, which suggests
whatever it was had them all in its grip. It goes without saying that in any normal circumstances, the group were well aware of the dangers of being outside in minus twenty to thirty temperatures without the requisite clothing. The effects of extreme cold are immediate, beginning with the constriction of the blood to preserve the body with sufficient winchell, frostbite is only a matter of minutes away. Basic muscle functions become progressively more and more reduced, until fingers can
no longer be moved, and then arms and legs. Hyperthermia sets in when the body temperature reaches thirty five degrees. Soon you become devastatingly disorientated, from which there is only a downward spiral of confusion. At thirty two degrees you begin to lose consciousness, before probable death around twenty eight degrees. All this they would have known, But fear has little
respect for the intricacies of survival and reason. As perhaps the most primitive of all our emotional reactions, how we respond to fear are less intensely conditioned, otherwise goes beyond past experience and personality, bypasses the ego and head straight to the id. For even the most high, highly trained and prepared soldier, not until you are actually presented with a genuine flight or fight experience do you know how you will respond, but more importantly, the response is completely
beyond your control. And if the hikers were inside the tent when whatever happened at first occurred, it wasn't something they saw that terrified them so, but something they must have heard. Are you always taking care of your family? Do you often take care of others and not yourself? Now it's time to take care of yourself, to make time for you. You deserve it. Tele adoc gives you access to a licensed therapist to help you get back
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to change counselors if needed. For free teledoc therapy is available through most insurance or employers. Download the app or visit teledoc dot com. Forward slash Unexplained Podcast Today to get started, that's teladoc dot com slash Unexplained podcast. In the early nineteen eighties, British engineer Vic Tandy worked as an engineering designer for a company manufacturing anesthetic and intensive
care equipment. The company operated out of a makeshift lab made from two back to back garages, which some of the employees claimed was haunted. It was certainly easy to see how being surrounded by all the eerie pieces of equipment that twitched and rasped with lives of their own might leave you feeling more than a little spoot. But as for actual ghosts, Vic was a confirmed man of
science and had little time for such nonsense. That was until the night Vic found himself working alone in the lab when he began to feel a strange sense of unease. Although he was cold, he started to sweat profusely before being hit by a profound and sudden low that swept over him, followed by the distinct impression that he was being watched, And then he saw it, a figure moving from out of the shadows into his peripheral vision. It was gray and silent, and moved just as he would
expect a person to move. Only there was nobody else in the room and all the doors were locked. Vic was terrified. Finally, having built up enough courage, he turned to face the apparition, at which point it vanished. A somewhat disturbed Vic put the event down to tiredness and went home. The following day, Vic, who was a keen fencer, had brought a blade into the lab that needed fixing. After securing the foil blade in a vice, Vic went to look for some oil, returning a short time later
to find something very strange occurring. The blade was wildly oscillating up and down completely of its own accord. Unsurprisingly, especially after the events of the previous night, it gave Vic a nasty fright. However, unwilling to believe that something ghostly had occurred, Vic resolved to find out just what exactly was going on. For the blade to be vibrating like that, it had to be receiving energy varying in intensity at a rate equal to the resonant frequency of
the blade. Any energy of this type might otherwise be referred to as sound. Vic eventually discovered that the lab seemed to be harboring a low frequency sound wave that was being reflected back and forth by the opposite ends of the garage, with the wave bouncing back into itself. It created a concentration of energy in the middle of the room with a frequency of roughly nineteen hertz. What Vic had been experiencing was the very real and very
physical effects of infrasound. Vic looked around the room for a possible source and noticed a newly installed extraction fan wearing away at the back. When he turned the fan off, the blade stopped vibrating. The phenomenon had first been discovered by French scientist Vladimir Gavre in very similar circumstances. Working in his lab in the nineteen sixties. Gavrou and his assistants had started to experience pain in their ears and
noticed lab equipment shaking without any obvious reason. He too discovered that a large extractor fan had been creating an infrasound wave. Infrasound is essentially any sound that registers at a frequency less than twenty herds, which, although inaudible to most human ears, can none the less induce feelings of
intense panic, dread, nausea, and, in extreme cases, hallucinations. However, many animals with more sensitively evolved hearing have no such problems with the frequency, with many including elephants and whales, relying heavily on such frequencies for communication. Remarkably, during the two thousand and four Indian Ocean earthquake and tsunami, many animals were witnessed fleeing the affected areas some time before
the devastating waves began to hit. It is highly likely that they had sensed the impending danger through infrasound generated by the earthquake. Could this same sound have caused such fear and panic in the Diatlov team? And imagine the effects of such a noise if it was combined with something audible, something that would have come suddenly and threateningly roaring from out of the dark, as if a jet
engine had been ignited next to the tent. In Donnika's fantastic book Dead Mountain, perhaps the most comprehensive account of the Diatlov Pass incident, it is just such a scenario that he concludes may have led the students to their deaths.
After extensively reviewing the evidence, Ike postulates that an obscure natural phenomenon known as a von Carmen vortex street may have occurred on the night of February the first such phenomena can be created when the flow of wind is sufficiently disrupted by blunt bodies, resulting in the creation of
extremely loud and violent tornadoes. It is ICA's belief that such an event could have been created by high speed winds pummeling into the smooth rounded mountain of Colatsiacle, sending vortices roaring down the mountain side right next to the Diatlov team's tent. Perhaps this is the same terrifying sound that would later give rise to stories of the compoland and their nausea inducing screams, or the chilling sound of Baba Yaga's pestle and mortar as she hurtles through the
forest in search of her next victim to devour. And Yet, could the broken bones and other devastating injuries found on a number of the hikers merely be the result of falls sustained in the panic. Lev Ivanoff had not been able to say anything at the time, but as the years went by, he would finally begin to open up his thoughts, collected in an extraordinary interview given in nineteen ninety I suspected at the time and I am almost sure now. He said that these bright flying spheres had
a direct connection to the group's death. Only those who were inside the orbs no more than me. But whether there were people inside that time or any other time is as yet unclear. If you enjoy listening to Unexplained and would like to show your appreciation, you can now help support us by going to Unexplained podcast dot com forward slash support. All donations, no matter how large or small, are massively appreciated. All elements of Unexplained are produced by me,
Richard McClain smith. Please subscribe and rate the show on iTunes, but feel free to get in touch with any thoughts or ideas regarding the stories you've heard on the show. Perhaps you have an explanation of your own you'd like to share. You can reach us online at Unexplained podcast dot com or on Twitter at Unexplained Pod. Now, it's time to take care of yourself. To make time for you, Tell a doc gives you access to a licensed therapist
to help you get back to feeling your best. Speak to a licensed therapist by phone or video anytime between seven am to nine pm local time, seven days a week. TELEDOC Therapy is available through most insurance or employers. Download the app, or visit teledoc dot com forward slash Unexplained podcast Today to get started. That's t e ladoc dot com Slash Unexplained Podcast