People see a huge number of UFOs every year, but cannot explain their nature. For a long time, the military and the authorities of the largest countries of the globe remained silent on this matter, but in recent years, the taboo on the ufological topic has gradually begun to disappear, revealing an amazing truth. To understand this issue, it is necessary to bring together all the links in the chain of ufological research. In this case, a big picture will emerge that will reveal to humanity the truth about the past, present, and possibly the future of the Earth. Are we alone in the universe? Do aliens really exist? Did they visit our planet? What is a UFO? How do aliens from outer space interact with the population of the Earth? You will find answers to these and many other questions in this book.