We continue to discover the mysteries of our recent past, the terrible and tragic. Improbable at first glance assumptions are confirmed by in many facts. Let us estimate the scale of events, range falsification and the concealment piece of evidences... The collection includes works by various authors, shed light on concealment of facts of nuclear war 1812-16 in Northern hemisphere, losing a part the earth's atmosphere as a result of of cataclysm 16-18th century, calling into question a traditional founding of the city on the Neva River in the 18th century.