The Dyatlov Pass Incident - Lev Ivanov was one of the police officials who led the case. Ivanov had previously published an article in 1990 where he wrote about receiving reports of strange spherical shapes in the sky during the time of the incident, and possible evidence of aliens.
Unexplained Mysteries: The Dyatlov Pass Incident- there is another article that goes into more depth. But this story scares the crap out of me. If you watch the devils pass it tells a good bit about this mystery
The Taman Shud Case..The victim was found dead at 6:30 am, December 1, 1948, under a street lamp at Somerton Beach in Australia. And with that, we have exhausted everything we know about the man. It's the things we don't know that have been baffling authorities ever since. Including the meaning of the apparently uncrackable secret code he left behind.(4-8-15-16-23-42).