Semyashkin's Experiment. Version (2010) (text abridged):

Sergey [SEMYASHKIN]: They left the storage shed at 3:00 PM. There are no further records. After that, we were just discovering and wondering what had happened. So, they left the storage shed. My time interval was 1:40 (or 100 minutes) to the tent site. They made it through.
We were also hacking through the snow, and the same thing happened. We started hacking with shovels, and theirs broke. The snow was so dense that the shovels broke. Our shovels broke too. We chopped with axes, skis... The mountainside was sloping, and we needed to make this place horizontal. We tried to take photos from the same angles as those available online. We tried to replicate this for comparative analysis. We accomplished all of this.
It's known that they all went into the tent. One of them urinated there in front of the tent entrance. Our director also accomplished this.
We spread out our things. The stove was brought in, but not lit. We had a snack. There were some skins from bacon and pork loin. That was their simple snack. We accomplished all of this, too.
And when everything that Dyatlov's group had done up until their escape from the tent (which is what this experiment was for) was completed, I gave the command and timed it. It was 6 hours, 6 minutes (and 6 seconds), and I said, "Something happened at that time."
Why did we set this time? For comparison. In 1959, at 6:00 PM, a space rocket was launched, so to speak, or there was a meteorite fall. And to figure something out, we recorded this time. We understand that it's approximate. Somewhere we hesitated, somewhere they did something quickly. Everyone understands that this isn't a strict coincidence, but that's what the experiment is for. And we recorded everything. At 6:06 PM, for some reason, they began to urgently leave the tent.
There were three cuts in the tent. Either one person cut it three times, or three had knives, we don't know. And since I had young and eager tourists with me, I gave the knife to only one of them and said:
"Okay, you cut the tent, and everyone else runs out through this hole!"
And at this time, video footage was being taken of this whole thing. At the moment we ran out of the tent, at 6:06 PM, it was like this: we ran along the route where the tracks led in 1959. We ran downhill, and the time was recorded again.
We ran downhill quickly, but two of us had to simply descend on foot (following adjacent tracks).
We, like Dyatlov's group, reached the cedar in 10 minutes, but these two got there in, say, 16 minutes. We recorded all of this. Finally, we reached the cedar. They had a fire there.
Here I split the group. Two people stayed by the cedar to start the fire. Moreover, our fire had to be burning from the first gathering. Since the people found near the cedar were naked, they didn't even have shoes on. In that state, you can only go out once (for firewood), grab something, and light it, instead of running around collecting it. You'll freeze your feet in no time.

And another team of guys was making a platform. I gave them the same task: chopping down these firs and birches with knives, where there were 12-14 firs in the platform. They chopped them down the same way, but later they admitted to me that they got tired of chopping with knives and they chopped down the last two trees with an axe. All of this was done.
And when we did all of this, our fire burned out. I was informed that the platform was ready... Again, all of this was established. If a person lives, he constantly leaves traces of his life activity. He goes to the bathroom, he eats, he chops wood, fells branches, and so on. Something's always happening.
We did everything they did... I set the time to 7:45 PM. At that point, no one from Dyatlov's group was alive. Again, how much longer it could have taken them is debatable. My time was 7:45 PM (99-100 minutes later), and by that time they were all already dead... That's it.The cause of death was the same for everyone: hypothermia. That's how the pathologist recorded it. The weather was, as in the case file, -25°C and hurricane-force winds. That's normal weather, when you can freeze to death. The concept of a hurricane-force wind doesn't just mean you'll freeze. It means the gale we had. And right there, as soon as I drove out there, my nose immediately turned white. My finger froze right off, in three minutes.
And I returned there 26 days later (February 26). We had abandoned the tent (February 2, 2010) and scattered the bodies (body bags where the bodies had been).
I conducted this experiment to compare the weather conditions of 1959 and 2010. But when I realized what kind of people I was talking to, I realized no one needed it. Everyone had their own opinions.
I had an argument with Buyanov. He was developing his avalanche theory that all the injuries were caused by an avalanche above, and they were bringing the bodies down. But his actual conclusion was based on the fact that there are bushes on this mountain, and there was abrasive processing of the tree trunks' bark. And he concludes: avalanches happen here regularly! Look, avalanches come one after another and whittle down these trees.
I start climbing and see the same thing, only from below, on another peak (on the way up). I conclude: it's not avalanches that are causing this. It's the wind, the drifting snow, blowing in one direction. And Buyanov writes a whole paragraph about this in his book. It all crumbles to pieces. Not a single fact, just speculation.
