UFO. Mysterious humanoids... What is it, who is it? Messengers from distant worlds or a hallucination, a mirage, completely understandable, although rare, atmospheric phenomena? But so many people in different parts of the globe have encountered humanoids and flying saucers that it is impossible not to take their evidence into account. For many years, scientists have been searching for answers to these questions, putting forward hypothesis after hypothesis. Who knows, perhaps very soon some of them will receive indisputable confirmation and become a scientific fact. No less mysterious are the stories that have come to us from the depths of centuries. One of them is the mystery of the famous Shroud of Turin. She is also talked about in this book.