Newspapers, radio, and television report mysterious incidents and phenomena almost every week. They excite curiosity and imagination, give scope for all kinds of reasoning and guesswork and, of course, again and again pose the main question to us: is this fantasy or reality? This brochure is an attempt to understand such still mysterious phenomena that, in all likelihood, have , place on our planet. The authors collected and systematized a huge amount of factual data and tried to logically link them into a single chain and explain them without going beyond the laws of physics.http://znak.traumlibrary.net