What is a halo and can you see the aurora in Chelyabinsk? How are the Tunguska meteorite and the mysterious "white nights" that were observed in the Southern Urals in 1908 related to each other? Can we have a real earthquake? Why did Chelyabinsk residents suffer a crushing defeat in the fight against tailed strangers - gray rats? Was there an alien "invasion" on the eve of World War II?