I think you are mistaking dmt for
Can-D, jbark...
I think the thing with the Siberians is more complex in nature and needs to be seen from a more inter-galactic perspective, because most likely alien species are involved. As we all know Roswell is not the only place aliens landed nor the first time it happened. Between the nine egyptian gods, that are really extra terrestrial, intergalactic travellers and overlords, the Sirians and the Nephilim, and others that I don't have the time to mention here, there have always been a few renegade alien scientists so to speak, that came here to do experiments on us. One small fraction of them landed in the darkness of Siberian winter and modified the genes of Siberians (a long time ago).
It may look like what Shaolin explained, but the whole of the matter is that there was a purpose behind this, and that it was designed, not caused by exposure to the cold. They were trying to open humans up to a permanent dmt-experience-like state of mind to further our evolution in a direction they desired (something not all the races in the galaxy agree on, which is why this operation was clandestine). These were only preliminary tests on a small select group of people. The idea was that if the break through was not achieved then interaction with the world around one could still take place while being in an enhanced state of mind. Unfortunately (maybe fortunately), for reasons unknown, the experiments were broken off before any real conclusion could be reached and before the altered genes could be perfected. The renegade extra terrestrial scientists took off in a hurry never to return.... leaving behind only more mystery.